Thornton is a town in Limestone County, Texas, United States.

The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

There were 248 housing units at an average density of 250.1 per square mile (96.6/km2).

23.8% of all households were made up of individuals, and 13.1% had someone living alone who was 65 years of age or older.

Thornton is served by the Groesbeck Independent School District.