Middleton is a city in Dane County, Wisconsin, United States, and a suburb of the state capital, Madison. Middleton's motto is "The Good Neighbor City." The population was 21,827 at the 2020 census.

Dane County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 561,504, making it the second-most populous county in Wisconsin after Milwaukee County. The county seat is Madison, which is also the state capital.