Unemployment Rate in Sussex County, DE was 5.10% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Sussex County, DE reached a record high of 14.10 in May of 2020 and a record low of 1.60 in July of 1990. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Sussex County, DE - last updated from the United States Federal Reserve on April of 2026.