加斯唐（Garstang）是位于英格兰兰开夏郡的一个城市和民政教区。2011年，加斯唐民政教区有人口4,268人。整个加斯唐市区有人口6,779人。

Garstang is an old market town and civil parish within the Wyre borough of Lancashire, England. It is 10 miles (16 km) north of the city of Preston and the same distance south of Lancaster. In 2011, the parish had a total resident population of 4,268; the larger Garstang Built-up Area, which includes the adjoining settlements of Bonds and Cabus, had population of 6,779. Garstang is famous for being the world's first ever Fairtrade Town.