Resident Population in Richland County, WI was 17.19700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Richland County, WI reached a record high of 18.18700 in January of 2007 and a record low of 16.40000 in January of 1972. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Richland County, WI - last updated from the United States Federal Reserve on May of 2024.