There are 7 US Post Offices in Butler County serving a total of 11,928 residents equating to 1,704 residents per post office. It's estimated that approximately 19,038 packages are handled across the 7 county post offices annually. Butler County is a county located in the US state of Kentucky. As of the 2010 census, the population was 12,690. Its county seat is Morgantown. The county was formed in 1810, becoming Kentucky's 53rd county. It is a prohibition, or \"dry\", county. Butler County is included in the Bowling Green, KY Metropolitan Statistical Area."