Hills is a city in Rock County, Minnesota, United States. Located approximately four miles (6 km) from the South Dakota border and two miles (3 km) from the Iowa border, it is the southwestern-most city in Minnesota. The population was 686 at the 2010 census.
According to the United States Census Bureau, the city has a total area of 0.5 square miles (1.3 km²), of which, 0.5 square miles (1.3 km²) of it is land and 2.00% is water. The landscape is flat with some gently rolling hills; however, the town's name does not derive from a particular topographical feature.
As of the census of 2000, there were 565 people, 230 households, and 149 families residing in the city. The population density was 1,160.7 people per square mile (445.2/km²). There were 244 housing units at an average density of 501.2 per square mile (192.3/km²). The racial makeup of the city was 99.29% White, 0.18% African American, 0.18% Asian, 0.18% Pacific Islander, and 0.18% from two or more races. Hispanic or Latino of any race were 0.35% of the population.