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Coordinates: 49°51′31″N 3°05′46″E / 49.8586°N 3.0961°E

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Trefcon
Commune
The town hall and school of Trefcon
Location of Trefcon
Trefcon Show map of France Trefcon Show map of Hauts-de-France
Coordinates: 49°51′31″N 3°05′46″E / 49.8586°N 3.0961°E / 49.8586; 3.0961
Country	France
Region	Hauts-de-France
Department	Aisne
Arrondissement	Saint-Quentin
Canton	Saint-Quentin-1
Intercommunality	Pays du Vermandois
Government
• Mayor (2020–2026)	Véronique Rozier^[1]
Area ¹	4.02 km² (1.55 sq mi)
Population (2022)^[2]	81
• Density	20/km² (52/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
INSEE/Postal code	02747 /02490
Elevation	61–98 m (200–322 ft) (avg. 100 m or 330 ft)
¹ French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries.

Trefcon (French pronunciation: [tʁɛfkɔ̃]) is a commune in the Aisne department in Hauts-de-France in northern France.

An old alternative name was Saint-Martin-des-Prés.^[3] Named after the old ruined church of the same name.^[4]

Population

Historical population
Year	Pop.	±% p.a.
1962	99	—
1968	94	−0.86%
1975	86	−1.26%
1982	87	+0.17%
1990	83	−0.59%
1999	95	+1.51%
2007	82	−1.82%
2012	89	+1.65%
2017	85	−0.92%
Source: EHESS (1962)^[5] and INSEE (1968–2017)^[6]