Unemployment Rate in McMullen County, TX was 5.90% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in McMullen County, TX reached a record high of 12.30 in July of 2020 and a record low of 0.00 in May of 1990. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in McMullen County, TX - last updated from the United States Federal Reserve on April of 2026.