Runnells is a city in Polk County, Iowa, United States. The population was 352 at the 2000 census. It is part of the Des Moines–West Des Moines Metropolitan Statistical Area.
Runnells incorporated as a city on May 21, 1903. It was named for John S. Runnells, a former editorial writer for the Iowa State Register and private secretary for Governor Samuel Merrill.
Runnells is located at 41°30′45″N 93°21′25″W / 41.5125°N 93.35694°W / 41.5125; -93.35694 (41.512450, -93.357063).