1980 Iowa highway transfer of jurisdiction

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Iowa Primary Highway System
Highways that changed jurisdiction around 1980 Removed highways Renumbered highways Added highways
System information
Notes	Primary highways in Iowa are generally state-maintained.
Highway names
Interstates	Interstate X (I-X)
US Highways	U.S. Highway X (US X)
State	Highway X (IA X or Iowa X)
System links
Iowa Primary Highway System Interstate US State Secondary Scenic

Beginning in 1979 and lasting through the early 1980s, a series of agreements between the Iowa Department of Transportation and individual county boards of supervisors led to a mass transfer of jurisdiction of several state highways in Iowa. County boards of supervisors were asked to convene functional classification boards in order to review the classification all of the highway miles within each respective county. Control of roads that were classified as trunk roads or trunk collector roads were transferred to the counties, while roads classified as arteries or arterial collectors were transferred to the state department of transportation. The vast majority of transfers took place in 1980.

Background

The 67th Iowa General Assembly passed a bill in 1978 that changed how the state department of transportation (DOT) classified highways and how they were funded throughout the state. The bill enacted an existing framework for county boards of supervisors to create reclassification boards that could appeal to a state board if certain changes to the road network were not satisfactory. The state's road use tax fund, which is the mechanism for allocating funds to the different levels of government for different levels of road, had both its inputs and outputs modified. The general fuel tax was raised from 7 to 8+1⁄2 cents per US gallon (1.8 to 2.2 ¢/L) for 1978 (equivalent to 33 to 40 cents per US gallon (8.7 to 10.6 ¢/L) in 2023), and to 10 ¢/US gal (2.6 ¢/L) for 1979 (equivalent to 42 ¢/US gal (11 ¢/L) in 2023).^[1]^[2]

The state was attempting to offset the effects the 1970s energy crisis and the 1973–75 recession which strained state budgets by reducing income due to reduced demand for gasoline and increasing inflation.^[3] The idea was for the DOT to save operational money by offloading minor highways to the respective counties. In 1979, Iowa had the 9th largest public road system in the United States with over 113,000 miles (182,000 km) of roadways, 10,000 miles (16,000 km) of which were primary highways, comprising Interstate Highways, U.S. Highways, and state highways. State planners sought to offload nearly one-third of the primary system. Naturally, county officials, whose road budgets were similarly strained, balked at the idea.^[4]

The Iowa Code provided a manner for determining the class of a particular highway. Each county was to appoint a three-member board, one of whom was to be a state DOT employee, one a county engineer or supervisor, and the other a municipal leader chosen by a majority of mayors in the county. The board was to classify each mile of roads and streets in the county into one of twelve categories. Only three categories applied to primary highways–freeways and expressways, arterials, and arterial connectors. The freeway-expressway and arterial systems had limits on total mileage, 2,660 and 3,500 miles (4,280 and 5,630 km), respectively. The only other requirement of the reclassification boards was to ensure network continuity between counties.^[5] Ultimately, these boards found about 1,000 miles (1,600 km) of minor highways that were on the primary system and 400 miles (640 km) of major highways on the secondary system.^[4]

County officials were not keen on the idea of taking over more highway miles from the state when their own road budgets were tight. Clarke County officials sued the state classification board when it suggested the county take over an 11-mile (18 km) portion of U.S. Highway 69 (US 69). They felt the DOT was attempting to dump unwanted highway miles, which were also in poor condition, on a county unwilling to accept them.^[3] Some counties felt pressure to accept roads from the state that the DOT had not maintained adequately.^[6] Grundy County had some success by reclassifying some roads slated for transfer, such as Iowa Highway 214 (Iowa 214) into Wellsburg. That highway was reclassified as an arterial collector extension, keeping in spirit with an agreement it had with the DOT to maintain the highway until "Interstate 520" was built.^[7] Other counties had appeals heard at the DOT headquarters in Ames.^[8]

Construction of new highways, such as Interstate 380 (I-380) would cause a chain reaction in other state highways. It was predicted in 1979 that opening I-380 in the Cedar Rapids area would cause Iowa 150 to lose its status as a primary highway because the route ran roughly parallel to the planned Interstate Highway's corridor.^[9] Indeed, when I-380 opened to traffic in 1984, Iowa 150 was rerouted away from Cedar Rapids over Iowa 101 to Vinton. One section of Iowa 150 along Collins Road in Cedar Rapids was still classified as an arterial connector; it became Iowa 100.

One provision in the Iowa Code required whichever agency maintained a section of highway previously to either repair the highway in question or to pay an appropriate amount of money equal to the costs of repairing the road to the agency receiving the road.^[10] In Johnson County, state and county officials had difficulty reaching an agreement on a former segment of Iowa 1, by then renumbered Iowa 979. County officials wanted the state to take over County Road W66 (CR W66) from I-80 to the west overlook of Coralville Lake. The state countered with an offer to pay to upgrade Iowa 979 as well as have the county take over three other highways in the county.^[11] The two sides were not any closer 18 months later when the DOT was ready to open a new four-lane US 218 south of Iowa City.^[12] The routes for which no agreement could be made were ultimately kept by the DOT and assigned new route numbers, as was the case with Iowa 979.

Routes removed

Lengths represent the distances removed from the state highway system


Number	Length (mi)^[13]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
Iowa 27	6.86	11.04	Alvord	US 75 near Rock Rapids	01930-01-011930	01980-01-011980
Iowa 42	4.18	6.73	US 275 / Iowa 2 near Sidney	Riverton	01920-01-011920	01980-01-011980
Iowa 43	1.58	2.54	Ringsted	Iowa 15 near Ringsted	01920-01-011920	01980-01-011980
Iowa 47	0.82	1.32	Iowa 14 near Allison	Allison	01951-01-011951	01980-01-011980
Iowa 54	2.99	4.81	Marble Rock	Iowa 14 east of Marble Rock	01920-01-011920	01980-01-011980
Iowa 77	7.80	12.55	Iowa 78 at Richland	Iowa 92 at Keota	01920-01-011920	02003-01-012003	Segment into Keota remained
Iowa 79	1.74	2.80	Iowa 2 near Bonaparte	Bonaparte	01920-01-011920	01980-01-011980
Iowa 84	2.13	3.43	The Eastern Iowa Airport	I-380 near Cedar Rapids	01943-01-011943	01980-01-011980
Iowa 86	0.47	0.76	Fertile	Iowa 9 at Fertile	01945-01-011945	01980-01-011980
Iowa 87	4.06	6.53	US 69 west of Elkhart	Elkhart	01920-01-011920	01983-01-011983
Iowa 88	8.01	12.89	US 61 / Iowa 2 in Fort Madison	Iowa 16 in Denmark	01940-01-011940	01980-01-011980
Iowa 89	7.69	12.38	Iowa 141 near Woodward	Iowa 17 in Madrid	01946-01-011946	01980-01-011980	Replaced by an extended Iowa 210
Iowa 90	16.32	26.26	I-80 in Dallas County	I-35 in Des Moines	01932-01-011932	01981-01-011981
Iowa 91	4.18	6.73	Ledyard	US 169 near Ledyard	01940-01-011940	01980-05-011980
Iowa 95	3.70	5.95	Carbon	Iowa 148 north of Corning	01932-01-011932	01983-01-011983
Iowa 101	15.56	25.04	US 218 in Vinton	Iowa 150 north of Urbana	01920-01-011920	01984-01-011984	Replaced by a relocated Iowa 150
Iowa 102	1.82	2.93	Hawkeye	US 18 near Hawkeye	01920-01-011920	01980-01-011980
Iowa 104	1.53	2.46	Woodburn	US 34 near Woodburn	01927-01-011927	01980-01-011980
Iowa 106	8.98	14.45	Iowa 107 in Clear Lake	US 65 in Mason City	01920-01-011920	01980-01-011980
Iowa 108	1.18	1.90	Delta	Iowa 92 near Delta	01923-01-011923	01980-01-011980
Iowa 112	5.19	8.35	Volga	Iowa 13 near Osborne	01931-01-011931	01980-01-011980
Iowa 114	9.20	14.81	Iowa 92 near West Chester	Iowa 22 at Wellman	01969-01-011969	01981-01-011981	Previously Iowa 81
Iowa 119	1.04	1.67	Dorchester	Iowa 76 near Dorchester	01923-01-011923	01980-01-011980
Iowa 120	0.80	1.29	Stanton	US 34 near Stanton	01924-01-011924	01980-01-011980
Iowa 123	0.45	0.72	US 34 near Rome	Rome	01970-01-011970	01980-01-011980
Iowa 125	3.26	5.25	Salem	US 218 near Salem	01924-01-011924	01981-01-011981
Iowa 126	0.97	1.56	US 6 near Mitchellville	Mitchellville	01924-01-011924	01980-01-011980
Iowa 134	4.06	6.53	US 65 near Hampton	Geneva	01935-01-011935	01980-01-011980
Iowa 135	1.96	3.15	Montour	US 30 near Montour	01954-01-011954	01980-01-011980
Iowa 152	1.31	2.11	US 34 near Murray	Murray	01926-01-011926	01980-01-011980
Iowa 155	3.05	4.91	Nodaway	US 34 near Nodaway	01933-01-011933	01980-01-011980
Iowa 156	0.33	0.53	Bussey city limits	Bussey	—	02003-01-012003	Turned over within city limits
Iowa 159	1.83	2.95	Iowa 92 near Harper	Harper	01929-01-011929	01980-01-011980
Iowa 166	0.57	0.92	Hastings	US 34 near Hastings	01930-01-011930	01980-01-011980
Iowa 167	3.21	5.17	Doon	US 75 near Doon	01930-01-011930	01980-01-011980
Iowa 168	2.70	4.35	Iowa 83 near Minden	Shelby	01930-01-011930	01980-01-011980
Iowa 171	1.05	1.69	Elberon	Iowa 21 near Elberon	01935-01-011935	01980-01-011980
Iowa 172	4.23	6.81	Elgin	US 18 in Clermont	01930-01-011930	01980-01-011980
Iowa 177	3.20	5.15	Iowa 9 near Osage	Elgin	01937-01-011937	01980-01-011980
Iowa 178	0.98	1.58	Iowa 9 near Little Rock	Little Rock	01930-01-011930	01980-01-011980
Iowa 179	0.76	1.22	US 69 near Klemme	Klemme	01930-01-011930	01980-01-011980
Iowa 180	2.46	3.96	Hayesville	Iowa 149 near Hayesville	01930-01-011930	01980-01-011980
Iowa 186	3.27	5.26	US 34 near Prescott	Prescott	01930-01-011930	01980-01-011980
Iowa 189	1.00	1.61	Bridgewater	Iowa 92 north or Bridgwater	01930-01-011930	01980-01-011980
Iowa 190	7.46	12.01	Fairbank	Iowa 150 near Oelwein	01931-01-011931	01980-01-011980	Replaced by Iowa 281
Iowa 198	0.43	0.69	Garrison	Garrison city limits	—	02003-01-012003	Turned over within city limits
Iowa 199	0.54	0.87	Van Horne city limits	Van Horne	—	02003-01-012003	Turned over within city limits
Iowa 200	0.59	0.95	Keystone city limits	Keystone	—	02003-01-012003	Turned over within city limits
Iowa 203	8.78	14.13	Terril	Iowa 9 near Superior	01920-01-011920	01980-01-011980
Iowa 213	3.72	5.99	Blakesburg	US 34 north or Blakesburg	01931-01-011931	01980-01-011980
Iowa 216	1.70	2.74	Iowa 5	Exline	01931-01-011931	01981-01-011981
Iowa 219	1.53	2.46	Iowa 9 near Lake Park	Lake Park	01931-01-011931	01980-01-011980
Iowa 221	2.44	3.93	US 69 near Story City	I-35 near Story City	—	02003-01-012003	Segment from I-35 to Roland remained
Iowa 222	14.72	23.69	Iowa 15 near Ottosen	Livermore	01931-01-011931	01980-01-011980
Iowa 226	10.78	17.35	US 18 near Wesley	Titonka	01931-01-011931	01980-01-011980
Iowa 231	1.83	2.95	Iowa 10 near Ireton	Ireton	01931-01-011931	01981-01-011981
Iowa 232	1.99	3.20	Earlham	I-80 near Earlham	01931-01-011931	01980-01-011980
Iowa 237	1.23	1.98	Ocheyedan	Iowa 9 near Ocheyedan	01931-01-011931	01981-01-011981
Iowa 241	0.99	1.59	Readlyn	Iowa 3 near Readlyn	01931-01-011931	01980-01-011980
Iowa 243	7.97	12.83	Iowa 140 near Kingsley	Pierson	01931-01-011931	01980-01-011980
Iowa 244	1.96	3.15	Henderson	US 59	01931-01-011931	01980-01-011980
Iowa 246	3.26	5.25	US 61 in Zwingle	La Motte	01931-01-011931	01980-01-011980
Iowa 248	0.49	0.79	Independence State Hospital	US 20 in Independence	01931-01-011931	01980-01-011980
Iowa 250	0.59	0.95	Lakota	US 169 / Iowa 9 near Lakota	01932-01-011932	01980-01-011980
Iowa 251	1.71	2.75	St. Charles	I-35 near St. Charles	01932-01-011932	01980-01-011980
Iowa 254	7.91	12.73	Iowa 9 near Buffalo Center	MN 254 near Rake	01969-01-011969	01980-01-011980
Iowa 255	2.26	3.64	Orchard	US 218 near Orchard	01932-01-011932	01980-01-011980
Iowa 256	0.80	1.29	Iowa 17 near Corwith	Corwith	01932-01-011932	01980-01-011980
Iowa 259	0.45	0.72	Tingley city limits	Tingley	—	02003-01-012003	Turned over within city limits
Iowa 262	1.99	3.20	US 69 near Galt	Galt	01933-01-011933	01980-01-011980
Iowa 263	2.02	3.25	Coulter	Latimer	01933-01-011933	01980-01-011980	Double spur route with Iowa 3
Iowa 264	2.39	3.85	Linn Grove	Iowa 10 near Linn Grove	01933-01-011933	01980-01-011980
Iowa 266	0.12	0.19	Weldon city limits	Weldon	—	02003-01-012003	Turned over within city limits
Iowa 267	1.19	1.92	Iowa 93 near Randalia	Randalia	01934-01-011934	01980-01-011980
Iowa 269	3.01	4.84	Iowa 16 near Stockport	Stockport	01934-01-011934	01980-01-011980
Iowa 270	1.80	2.90	Iowa 16 near Hillsboro	Hillsboro	01934-01-011934	01980-01-011980
Iowa 271	0.84	1.35	Iowa 4 near Yale	Yale	01935-01-011935	01980-01-011980
Iowa 277	6.24	10.04	Numa	Iowa 5 near Centerville	01935-01-011935	01980-01-011980
Iowa 278	2.05	3.30	Rathbun	Iowa 5 near Rathbun	01935-01-011935	01980-01-011980
Iowa 279	0.72	1.16	Atkins city limits	Atkins	—	02003-01-012003	Turned over within city limits
Iowa 284	5.58	8.98	Aurora	Iowa 187 at Lamont	01935-01-011935	01980-01-011980
Iowa 287	0.42	0.68	Newhall city limits	Newhall	—	02003-01-012003	Turned over within city limits
Iowa 288	4.58	7.37	US 65 near Manly	Plymouth	01935-01-011935	01980-01-011980
Iowa 289	6.14	9.88	Alta Vista	US 63 near Lourdes	01935-01-011935	01980-01-011980
Iowa 290	1.99	3.20	Farmersburg	Iowa 13 near Farmersburg	01935-01-011935	01980-01-011980
Iowa 291	1.01	1.63	Low Moor	US 30 near Low Moor	01935-01-011935	01979-01-011979
Iowa 292	3.17	5.10	Linden	Iowa 44	01935-01-011935	01980-01-011980
Iowa 293	1.42	2.29	Iowa 90 near Van Meter	Van Meter	01935-01-011935	01980-01-011980
Iowa 295	5.09	8.19	Westgate	Iowa 150 near Maynard	01935-01-011935	01980-01-011980
Iowa 296	4.44	7.15	CR C24 near Wadena	Iowa 56 near Wadena	01935-01-011935	01980-01-011980
Iowa 302	3.00	4.83	Thor	Iowa 3 near Thor	01935-01-011935	01980-01-011980
Iowa 303	3.51	5.65	US 34 near Fairfield	Libertyville	01935-01-011935	01981-01-011981
Iowa 304	1.59	2.56	Iowa 78 near Ollie	Ollie	01935-01-011935	01980-01-011980
Iowa 309	2.32	3.73	Beacon	Iowa 137 in Oskaloosa	01935-01-011935	01980-01-011980
Iowa 311	0.55	0.89	Liscomb	Liscomb city limits	01935-01-011935	01989-01-011989	Turned over within city limits
Iowa 312	5.70	9.17	Iowa 9 near Riceville	McIntire	01935-01-011935	01980-01-011980
Iowa 313	2.03	3.27	Melvin city limits	Melvin	01935-01-011935	02002-01-012002
Iowa 317	0.81	1.30	US 65 near Zearing	Zearing	01935-01-011935	01980-01-011980
Iowa 318	5.51	8.87	Clutier	Iowa 21 near Clutier	01935-01-011935	01980-01-011980
Iowa 319	0.50	0.80	Gravity	Iowa 148 at Gravity	01935-01-011935	01980-01-011980
Iowa 323	3.74	6.02	Iowa 17 near Woolstock	Woolstock	01935-01-011935	01980-01-011980
Iowa 325	0.47	0.76	Spillville	Spillville city limits	01935-01-011935	02003-01-012003	Turned over within city limits
Iowa 326	2.18	3.51	Bristow	Iowa 3 near Bristow	01935-01-011935	01981-01-011981
Iowa 328	2.29	3.69	US 20 near Galva	Galva	01935-01-011935	01980-01-011980
Iowa 329	4.85	7.81	US 169 at Boxholm	Pilot Mound	01935-01-011935	01980-01-011980
Iowa 332	1.00	1.61	Pilot Knob State Park	Iowa 9 near Forest City	01935-01-011935	01980-01-011980	Park access road
Iowa 334	1.87	3.01	US 63 near Frederika	Frederika	01935-01-011935	01980-01-011980
Iowa 335	0.64	1.03	Iowa 141 near Dawson	Dawson	01935-01-011935	01980-01-011980
Iowa 336	2.48	3.99	Iowa 150 near Rowley	Rowley	01936-01-011936	01980-01-011980
Iowa 337	3.36	5.41	Iowa 9 near Grafton	Grafton	01936-01-011936	01980-01-011980
Iowa 342	0.95	1.53	Iowa 141 near Jamaica	Jamaica	01936-01-011936	01980-01-011980
Iowa 343	1.01	1.63	Iowa 333 near Northboro	Northboro	01937-01-011937	01980-01-011980
Iowa 351	0.86	1.38	Rembrandt	US 71 near Rembrandt	01938-01-011938	01981-01-011981
Iowa 352	0.75	1.21	US 71 near Truesdale	Truesdale	01938-01-011938	01981-01-011981
Iowa 353	0.35	0.56	Rowan	Iowa 3 at Rowan	01938-01-011938	01980-01-011980
Iowa 356	6.37	10.25	Packwood	Iowa 1 near Packwood	01938-01-011938	01981-01-011981
Iowa 358	1.55	2.49	Whittemore	US 18 / Iowa 15 near Whittemore	01938-01-011938	01980-01-011980
Iowa 362	1.17	1.88	Macedonia	US 59 near Macedonia	01938-01-011938	01980-01-011980
Iowa 364	0.74	1.19	Cota Creek	Harpers Ferry	01938-01-011938	02003-01-012003	Turned over within city limits
Iowa 365	1.07	1.72	Tracy	Iowa 92 near Tracy	01939-01-011939	01980-01-011980
Iowa 367	3.39	5.46	Rutland	US 169 near Humboldt	01942-01-011942	01980-01-011980
Iowa 369	5.54	8.92	Iowa 2 near Moulton	Unionville	01942-01-011942	01980-01-011980
Iowa 374	7.99	12.86	US 71 near Sioux Rapids	Webb	01942-01-011942	01980-01-011980
Iowa 377	0.51	0.82	Harbor Drive in Sioux City	Iowa 970 in Sergeant Bluff	01942-01-011942	01980-01-011980	Airport access road
Iowa 379	4.59	7.39	Joice	Iowa 105 near Lake Mills	01942-01-011942	01980-01-011980
Iowa 381	0.67	1.08	Iowa 254 near Rake	Rake	01954-01-011954	01980-01-011980
Iowa 387	0.52	0.84	Davenport Municipal Airport	US 61 3 miles north of Davenport	01951-01-011951	01979-01-011979
Iowa 388	0.35	0.56	Calumet	US 59 at Calumet	01946-01-011946	01980-01-011980
Iowa 390	0.74	1.19	Iowa 10 near Marathon	Marathon	01946-01-011946	01980-01-011980
Iowa 393	2.40	3.86	Ionia	US 18 near Ionia	01948-01-011948	01980-01-011980
Iowa 394	1.72	2.77	Iowa 2 near Denmark	Iowa Army Ammunition Plant southern entrance	01948-01-011948	01980-01-011980
Iowa 395	0.53	0.85	Melbourne	Iowa 330 near Melbourne	01948-01-011948	01983-01-011983
Iowa 396	0.52	0.84	Iowa 175 near Farnhamville	Farnhamville	01954-01-011954	01980-01-011980
Iowa 398	1.24	2.00	Brooklyn	US 6 near Brooklyn	01956-01-011956	01980-01-011980
Iowa 400	4.54	7.31	Truro	I-35 near Truro	01958-01-011958	01980-01-011980
Iowa 403	0.70	1.13	Cushing	US 20 near Cushing	01958-01-011958	01980-01-011980
Iowa 405	0.24	0.39	Lone Tree	Lone Tree city limits	01958-01-011958	02003-01-012003	Turned over within city limits
Iowa 408	7.40	11.91	US 169 near Lu Verne	Lu Verne	01957-01-011957	01980-01-011980
Iowa 412	4.72	7.60	US 63 in Waterloo	US 218 in Waterloo	01960-01-011960	01983-01-011983	San Marnan Drive in Waterloo
Iowa 413	3.95	6.36	US 20 in Fort Dodge	Fort Dodge Municipal Airport	01960-01-011960	01980-01-011980
Iowa 424	0.44	0.71	Britt city limits	US 18 near Britt	01961-01-011961	01980-01-011980
Iowa 426	0.52	0.84	Iowa 92 near Rose Hill	Rose Hill	01960-01-011960	01980-01-011980
Iowa 428	1.21	1.95	Anamosa	US 151 / Iowa 64 at Anamosa	01965-01-011965	01980-01-011980
Iowa 924	4.00	6.44	Webster–Greene County Line	Iowa 175 near Farnhamville	01980-01-011980	01982-01-011982
Iowa 933	0.74	1.19	Iowa 141 in Perry	Iowa 141 in Perry	01976-01-011976	01984-01-011984	Former section of Iowa 141
Iowa 934	1.07	1.72	US 61 near Burlington	US 61 near Burlington	01976-01-011976	01980-01-011980	Former section of US 61; now Memorial Park Road
Iowa 935	0.77	1.24	—	—	01976-01-011976	01981-01-011981	Former section of US 34 parallel to Business US 34 in Burlington
Iowa 938	1.57	2.53	Iowa 947 near Manchester	Manchester Fish Hatchery	01976-01-011976	01980-01-011980	Former Iowa 116
Iowa 939	6.76	10.88	US 65	Iowa 2 near Corydon	01976-01-011976	01980-01-011980	Former section of Iowa 2
Iowa 940	2.51	4.04	—	—	01976-01-011976	01980-01-011980	Former sections of Iowa 2
Iowa 941	2.99	4.81	County Road J18 in Moravia	Iowa 5 near Moravia	01976-01-011976	01980-01-011980	Former section of Iowa 5
Iowa 942	5.70	9.17	Iowa 5 near Moravia	County Road J18 in Moravia	01976-01-011976	01980-01-011980	Former sections of Iowa 5
Iowa 943	0.69	1.11	—	—	01974-01-011974	01980-01-011980	Former section of Iowa 13 in Central City
Iowa 944	0.99	1.59	Iowa 13 in Manchester	Iowa 13 in Manchester	01976-01-011976	01980-01-011980	Former section of Iowa 13
Iowa 946	2.72	4.38	Luana city limits	US 18 / US 52 in Monona	01976-01-011976	01980-01-011980	Former section of US 18 / US 52 concurrency; two sections
Iowa 947	23.75	38.22	Iowa 187	Dyersville city limits	01976-01-011976	01981-01-011981	Former section of US 20
Iowa 951	2.65	4.26	US 34 west of Osceola	US 34 near Osceola	01976-01-011976	01980-01-011980	Former section of US 34
Iowa 952	0.18	0.29	—	—	01978-01-011978	01982-01-011982	Former section of US 67 north of Clinton
Iowa 953	0.89	1.43	Iowa 38 near Muscatine	Iowa 38 in Muscatine	01976-01-011976	01980-01-011980	Former section of Iowa 38
Iowa 959	1.27	2.04	US 65 / US 69 in Des Moines	Des Moines city limits	01970-01-011970	01981-01-011981	Former section of US 65 / US 69 concurrency
Iowa 960	1.58	2.54	Clarinda city limits	Iowa 2 near Clarinda	01973-01-011973	01982-01-011982	Former section of Iowa 2
Iowa 961	0.56	0.90	Villisca city limits	US 71 near Villisca	01976-01-011976	01980-01-011980	Former section of US 71
Iowa 965	3.29	5.29	—	—	01976-01-011976	01980-01-011980	Former section of US 52
Iowa 969	0.52	0.84	US 169 near Burt	Burt	01976-01-011976	01980-01-011980	former Iowa 422
Iowa 971	10.78	17.35	Iowa 2	US 59 in Shenandoah	01975-01-011975	01979-01-011979	Former section of Iowa 2
Iowa 972	10.17	16.37	Iowa 92 / US 169 in Winterset	US 169	01974-01-011974	01980-01-011980	Former section of US 169
Iowa 973	1.49	2.40	Iowa 92 in Winterset	Iowa 972 in Winterset	01976-01-011976	01980-01-011980	Former section of Iowa 92
Iowa 976	2.00	3.22	US 218	Mount Pleasant city limits	01974-01-011974	01980-01-011980	Former section of US 218; formerly Iowa 972
Iowa 980	0.77	1.24	US 34 near Ottumwa	Ottumwa city limits	01967-01-011967	01980-01-011980	Former section of US 34; formerly US 34 Alternate
Iowa 981	0.44	0.71	Iowa 150 near Fayette	Fayette city limits	01967-01-011967	01980-01-011980	Former section of Iowa 150; formerly Iowa 991
Iowa 983	0.81	1.30	US 34 west of Chariton	US 34 east of Chariton	01967-01-011967	01980-01-011980	Former section of US 34; formerly Iowa 995 and Iowa 996
Iowa 984	2.24	3.60	Bettendorf city limits	US 67 in Le Claire	01968-01-011968	01982-01-011982	Former section of Iowa 417
Iowa 999	2.22	3.57	Spruce Street in College Springs	Iowa 333 near College Springs	01961-01-011961	01980-01-011980	Former section of Iowa 333
Former

Routes added


Number	Length (mi)^[14]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
Iowa 79	5.64	9.08	Geode State Park	US 34 in Middletown	01980-01-011980	02003-01-012003
Iowa 91	4.64	7.47	Iowa 9 in Lyon County	MN 91 at the Minnesota state line	01980-01-011980	02003-01-012003
Iowa 100	2.74^[15]	4.41	I-380 in Cedar Rapids	US 151 in Cedar Rapids	01984-01-011984	current
Iowa 102	15.96	25.69	Iowa 163 in Pella	US 63 / Iowa 146 in New Sharon	01980-01-011980	current
Iowa 115	1.24	2.00	US 34 near Stanton	Viking Lake State Park	01980-01-011980	02003-01-012003
Iowa 134	1.75	2.82	Beed's Lake State Park	Iowa 3 near Hampton	01980-01-011980	01987-01-011987
Iowa 142	20.96	33.73	Iowa 2 in Plano	Iowa 5 near Moravia	01980-01-011980	02003-01-012003
Iowa 152	1.34	2.16	I-35 near Osceola	US 69 at Osceola	01980-01-011980	02014-01-012014
Iowa 186	3.38	5.44	Green Valley State Park	Iowa 25 in Creston	01980-01-011980	02001-01-012001
Iowa 192	4.74	7.63	I-29 / I-80 at Council Bluffs	I-29 at Council Bluffs	01931-01-011931	02017-01-012017	Was decommissioned in 1975, but restored in 1980
Iowa 243	0.56	0.90	Black Hawk Lake State Park	US 71 / Iowa 175 near Wall Lake	01980-01-011980	02003-01-012003
Iowa 244	0.68	1.09	I-80 near Neola	Iowa 191 in Neola	01980-01-011980	02003-01-012003
Iowa 362	5.09	8.19	Wilson State Park	I-29 at Loveland	01980-01-011980	02003-01-012003
Iowa 394	10.67	17.17	Route B at St. Francisville, Mo.	US 218 near Donnellson	01980-01-011980	02005-01-012005	Replaced by Iowa 27
Iowa 403	0.47	0.76	SD 48 near Akron	Iowa 12 in Akron	01980-01-011980	02003-01-012003
Iowa 428	5.75	9.25	Maquoketa Caves State Park	US 61 near Maquoketa	01980-01-011980	02003-01-012003
Iowa 918	1.12^[15]	1.80	Iowa 16 near Eldon	Iowa 16 in Eldon	01984-01-011984	02003-01-012003	Former section of Iowa 16
Iowa 919	0.29^[15]	0.47	Iowa 363 in Urbana	Walnut Street in Urbana	01984-01-011984	01995-01-011995	Former section of Iowa 363
Iowa 920	12.61^[15]	20.29	Center Point	Iowa 150 near Urbana	01984-01-011984	02003-01-012003	Former section of Iowa 150
Iowa 921	12.47^[15]	20.07	Iowa 920 in Center Point	Hiawatha	01984-01-011984	01985-01-011985	Former section of Iowa 150
Iowa 922	1.27^[15]	2.04	US 61 in Muscatine	Iowa 22 in Muscatine	01984-01-011984	01986-01-011986	Former section of US 61; became part of an extended Iowa 38
Iowa 923	4.52^[16]	7.27	—	—	01982-01-011982	02003-01-012003	Former section of US 218; had three sections
Iowa 925	24.32	39.14	I-80 / US 6 in Adair	US 6 near Dexter	01980-01-011980	02003-01-012003	Former section of US 6
Iowa 926	6.63	10.67	US 6 in Altoona	US 6 / Iowa 14 in Newton	01980-01-011980	01988-01-011988	Former section of US 6
Iowa 927	19.02	30.61	US 6 / Iowa 38 in Wilton	I-280 / US 6 near Davenport	01980-01-011980	02003-01-012003	Former section of US 6
Iowa 928	17.15	27.60	Iowa 17 near Webster City	CR D20 near Williams	01980-01-011980	02003-01-012003	Former section of US 20
Iowa 929	0.79	1.27	Murray city limits	Maple Street in Murray	01980-01-011980	02003-01-012003	Former section of Iowa 152
Iowa 931	8.47	13.63	I-35 in Ankeny	US 65 in Polk County	01980-01-011980	02003-01-012003
Iowa 935	1.38^[16]	2.22	I-29	Mills–Pottawattamie county line	01982-01-011982	02003-01-012003	Former section of Iowa 370
Iowa 938	0.46	0.74	Unionville	Unionville city limits	01980-01-011980	02003-01-012003	Former section of Iowa 369
Iowa 939	12.37	19.91	Independence	Iowa 187 near Masonville	01980-01-011980	02003-01-012003	Former section of US 20
Iowa 942	0.47	0.76	Woodburn	Woodburn city limits	01980-01-011980	02003-01-012003	Former section of Iowa 104
Iowa 943	0.43	0.69	Galva	Galva city limits	01980-01-011980	01987-01-011987	Former section of Iowa 328
Iowa 944	0.56	0.90	US 61 / Iowa 2 in Fort Madison	Fort Madison city limits	01980-01-011980	02003-01-012003	Former section of Iowa 88
Iowa 945	4.61	7.42	I-80 near Altoona	Iowa 931 in Polk County	01980-01-011980	02003-01-012003
Iowa 950	3.35	5.39	US 6 / US 65 in Altoona	Iowa 163 in Pleasant Hill	01980-01-011980	01994-01-011994	Now 34th Avenue/56th Street
Iowa 951	3.15^[15]	5.07	Carbon city limits	Iowa 148	01983-01-011983	01993-01-011993	Former section of Iowa 95
Iowa 960	1.11^[16]	1.79	—	—	01982-01-011982	01986-01-011986	Former section of US 61
Iowa 985	1.95	3.14	US 52 near Bellevue State Park	US 52 near Bellevue	01980-01-011980	02003-01-012003
Former

Existing route changes

Number	Change in length		Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
Number	mi^[a]	km	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
Iowa 21	12.42	19.99	Iowa 149 near Hedrick	Iowa 92 near Delta	01934-01-011934	current	Extended south from Iowa 92
Iowa 25	-6.99	−11.25	Blockton	Iowa 2 near Benton	01926-01-011926	current	Continued south to Blockton
Iowa 28	6.18	9.95	Iowa 5 in Des Moines	US 6 in Des Moines	01926-01-011926	current	Extended north from Iowa 5
Iowa 72	3.16	5.09	Dows	I-35 east of Dows	01920-01-011920	01986-01-011986	Extended east from Dows
Iowa 139	-12.25	−19.71	Protivin	Iowa 9 at Cresco	01930-01-011930	current	Spur route to Protivin removed
Iowa 140	15.55	25.03	Kingsley	Iowa 3 at Remsen	01926-01-011926	current	Extended north from Kingsley
Iowa 145	3.13	5.04	I-29 near Thurman	Thurman	01931-01-011931	02003-01-012003	Extended west from Thurman
Iowa 150	-11.05^[b]	−17.78	US 151 in Cedar Rapids US 218 at Vinton	Iowa 101 in Benton County Iowa 920 in Benton County	01941-01-011941	current	Rerouted over Iowa 101 in 1984
Iowa 160	1.24	2.00	US 69 at Ankeny	I-35 at Ankeny	01947-01-011947	current	Extended east within Ankeny
Iowa 173	11.53	18.56	Iowa 83 near Atlantic	Elk Horn	01930-01-011930	current	Extended south from Elk Horn
Iowa 210	19.58	31.51	Iowa 141 near Woodward	Slater	01931-01-011931	current	Rerouted over Iowa 89
Iowa 212	-10.02	−16.13	Iowa 21 near Belle Plaine	US 30 near Chelsea	01934-01-011934	current	Continued northwest to US 30 until 1980
Iowa 220	-2.20^[c]	−3.54	Upper South Amana Iowa 149 at Amana	US 6 / Iowa 149 at South Amana East Amana	01931-01-011931	current	Continued east to East Amana and south to Upper South Amana until 1980
Iowa 223	6.94	11.17	Iowa 330 near Baxter	Baxter	01931-01-011931	01997-01-011997	Extended west from Baxter
Iowa 224	9.37	15.08	Kellogg	Iowa 14 near Laurel	01931-01-011931	current	Extended north from Kellogg in 1980
Iowa 281	17.29	27.83	Dunkerton	Iowa 150 at Oelwein	01935-01-011935	current	Rerouted over Iowa 190
Iowa 333	-3.77	−6.07	Fremont–Page county line near Northboro I-29 at Hamburg	US 71 near Braddyville US 59 near Northboro	01935-01-011935	current	Route swap
Former