There are 9 US Post Offices in Gallia County serving a total of 32,558 residents equating to 3,618 residents per post office. It's estimated that approximately 51,966 packages are handled across the 9 county post offices annually. Gallia County (pronunciation: GAL-yuh) is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 30,934. Its county seat is Gallipolis. Its name is the Latin word for \"France.\" Gallia County is also known by nickname \"Little Cardiganshire\". Gallia County is part of the Point Pleasant, WV-OH Micropolitan Statistical Area."