St Thomas' Church is a Church of England church in Garstang, a market town in Lancashire, England. It is an active Church of England parish church in the Diocese of Blackburn and the archdeaconry of Lancaster. The church was built in 1770 as a chapel of ease to St Helen's Church in nearby Kirkland and was later assigned its own parish. It is recorded in the National Heritage List for England as a designated Grade II listed building.

Garstang is a civil parish in the Wyre district of Lancashire, England. It contains 17 listed buildings that are recorded in the National Heritage List for England. All the listed buildings are designated at Grade II, the lowest of the three grades, which is applied to "buildings of national importance and special interest". The parish includes the market town of Garstang, and all the listed buildings are in the town. These include a medieval cross base, a former slaughterhouse, houses and shops, a church with associated structures, the former town hall, a former grammar school, public houses, a milestone, and a boundary stone. The Lancaster Canal passes through the parish, and two bridges crossing it are listed.