Austintown is a census-designated place (CDP) within Austintown Township, Mahoning County, Ohio, United States. The population was 29,677 at the 2010 census.
It is part of the Youngstown-Warren-Boardman, OH-PA Metropolitan Statistical Area.
Austintown Township was founded in 1793 in a section that used to be known as the Connecticut Western Reserve, located in northeast Ohio. It was surveyed as a parcel of land 5 miles (8 km) on each side, as were other townships of the Connecticut Western Reserve. Austintown was named for Warren resident and Western Reserve judge Calvin Austin.
Austintown is located at 41°5′30″N 80°44′17″W (41.091743, -80.738103). The Austintown CDP takes up slightly less than half of the area of Austintown Township, largely on the eastern side of the township, where it abuts the western border of the city of Youngstown.
According to the United States Census Bureau, the CDP has a total area of 11.7 square miles (30.2 km2), of which 11.6 square miles (30.1 km2) is land and 0.04 square miles (0.1 km2), or 0.29%, is water.
Ohio State Route 11 is a north-south freeway which passes through the CDP, with access from Exit 39. Interstate 680 passes east-to-west through the northern part of the CDP but provides no access. Interstate 80 passes to the north of the CDP, with access from Exit 223.
As of the census of 2000, there were 31,627 people, 13,419 households, and 8,762 families residing in the CDP. The population density was 2,709.3 people per square mile (1,046.4/km2).