Cedar Falls is a city in Black Hawk County, Iowa, United States. As of the 2020 census, the city population was 40,713. Cedar Falls is home to the University of Northern Iowa, a public university.

Black Hawk County is a county in the northeastern part of U.S. state of Iowa. As of the 2020 census, the population was 131,144, making it Iowa's fifth-most populous county. The county seat is Waterloo.