There are 1 US Post Offices in Trigg County serving a total of 13,422 residents equating to 13,422 residents per post office. It's estimated that approximately 21,423 packages are handled across the 1 county post offices annually. Trigg County is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 14,339. Its county seat is Cadiz. It was formed in 1820 and named for Stephen Trigg, an officer in the American Revolutionary War who was killed at the Battle of Blue Licks. Trigg was a prohibition or dry county until 2009, when the county's voters narrowly approved a referendum to repeal the prohibition on alcohol sales. Trigg County is part of the Clarksville, TN\u2013KY Metropolitan Statistical Area. Trigg County is governed by a Fiscal Court, which is led by a Judge-Executive. The current Judge-Executive is Hollis Alexander (D). Alexander was appointed to the position in 2013 after Stanley H. Humphries was elected to the Kentucky State Senate from District 1."