Hills is a city in Johnson County, Iowa, United States.

[3] According to the United States Census Bureau, the city has a total area of 0.63 square miles (1.63 km2), all land.

There were 422 housing units at an average density of 563.1 per square mile (217.4/km2).

Hispanic or Latino persons of any race comprised 5.8% of the population.

There were 349 housing units at an average density of 554.0 per square mile (213.9/km2).

30.8% of all households were made up of individuals, and 15.7% had someone living alone who was 65 years of age or older.

There were 257 housing units at an average density of 431.8 per square mile (166.7/km2).

22.8% of all households were made up of individuals, and 8.4% had someone living alone who was 65 years of age or older.