Unemployment Rate in Union County, NJ was 4.20% in April of 2026, according to the United States Federal Reserve. Historically, Unemployment Rate in Union County, NJ reached a record high of 15.00 in May of 2020 and a record low of 2.90 in April of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Union County, NJ - last updated from the United States Federal Reserve on June of 2026.