Unemployment Rate in McClain County, OK was 3.20% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in McClain County, OK reached a record high of 10.70 in April of 2020 and a record low of 1.90 in November of 1999. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in McClain County, OK - last updated from the United States Federal Reserve on April of 2026.