Unemployment Rate in Lamar County, TX was 4.00% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Lamar County, TX reached a record high of 11.00 in July of 2011 and a record low of 3.10 in April of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Lamar County, TX - last updated from the United States Federal Reserve on April of 2026.