Unemployment Rate in Carroll County, NH was 2.90% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Carroll County, NH reached a record high of 20.20 in April of 2020 and a record low of 1.80 in August of 1998. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Carroll County, NH - last updated from the United States Federal Reserve on April of 2026.