Unemployment Rate in Middlesex County, NJ was 4.40% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Middlesex County, NJ reached a record high of 14.40 in May of 2020 and a record low of 2.50 in April of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Middlesex County, NJ - last updated from the United States Federal Reserve on April of 2026.