Resident Population in Adams County, WI was 21.35200 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Adams County, WI reached a record high of 21.52800 in January of 2023 and a record low of 9.23400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Adams County, WI - last updated from the United States Federal Reserve on April of 2026.