Alliance is a city in eastern Stark County, Ohio, United States, with a small district lying in adjacent Mahoning County. The population was 21,672 as of the 2020 census. The city is approximately 16 miles (26 km) northeast of Canton, 27 miles (43 km) southwest of Youngstown and 51 miles (82 km) southeast of Cleveland.

Stark County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 374,853. Its county seat is Canton. The county was created in 1808 and organized the next year. It is named for John Stark, an officer in the American Revolutionary War.