Unemployment Rate in Adams County, CO was 3.90% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Adams County, CO reached a record high of 12.30 in May of 2020 and a record low of 2.30 in April of 2017. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Adams County, CO - last updated from the United States Federal Reserve on April of 2026.