Sealy is a city in Austin County in southeastern Texas, United States. The population was 6,839 at the 2020 census. Sealy is located 49 miles (79 km) west of the downtown Houston area, on the most eastern part of the Texas-German belt region, an area settled by German emigrants.

Austin County is a rural, agricultural dominated county in the U.S. state of Texas. As of the 2020 census, the population was 30,167. Its seat is Bellville. The county and region was settled primarily by German emigrants in the 1800s.