St. Gregory's Church, Church of St Gregory, or variants thereof, may refer to:
Armenia
- St. Gregory Church in Haghartsin Monastery
- Saint Gregory the Illuminator Cathedral, Yerevan
- Saint Gregory the Illuminator Church, Yerevan (destroyed)
Azerbaijan
Georgia
- Saint Gregory the Illuminator Church, Tbilisi (destroyed)
Malta
Italy
- San Gregorio Armeno, Naples
Singapore
- Armenian Church, Singapore (dedicated to St. Gregory the Illuminator)
United States
- St. Gregory the Great Church, Danbury, Connecticut
- Church of St. Gregory the Great (New York City)
- St. Gregory's Church (St. Nazianz, Wisconsin)
United Kingdom
England
- St Gregory's Church, Bedale
- St Gregory's Church, Cheltenham, Gloucestershire
- St Gregory's Church, Heckingham, Norfolk
- St Gregory's Minster, Kirkdale, North Yorkshire
- St Gregory by St Paul's, City of London (destroyed)
- St Patrick's Church, Preston Patrick, Cumbria (formerly St Gregory's)
- Church of St Gregory, Stoke St Gregory, Somerset
- Church of St Gregory, Weare, Somerset
- St Gregory's Church, Vale of Lune, Cumbria