Elk Run Heights is a city in Black Hawk County, Iowa, United States. The population was 1,069 at the 2020 census. It is part of the Waterloo–Cedar Falls Metropolitan Statistical Area.

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.