Redfield is a city, one of two incorporated settlements in Union Township, Dallas County, Iowa, United States, along the Middle Raccoon River…Redfield is a city, one of two incorporated settlements in Union Township, Dallas County, Iowa, United States, along the Middle Raccoon River. The population was 731 at the time of the 2020 census. It is part of the Des Moines–West Des Moines Metropolitan Statistical Area.