La Grange (/lə ˈɡreɪndʒ/ lə GRAYNJ) is a city in Fayette County, Texas, United States, near the Colorado River. La Grange is in the center of the Texas-German belt. The population was 4,391 at the 2020 census,[4] and in 2018 the estimated population was 4,632.[5] La Grange is the county seat of Fayette County.