Thornton is a city in Cerro Gordo County, Iowa, United States. The population was 400 at the time of the 2020 census. It is part of the Mason City Micropolitan Statistical Area.
Geography
Thornton, Iowa is located at (42.944972, -93.384115).
thumb|right|A road in Thornton in 2024According to the United States Census Bureau, the city has a total area of , all land.