There are 6 US Post Offices in Gentry County serving a total of 7,039 residents equating to 1,173 residents per post office. It's estimated that approximately 11,235 packages are handled across the 6 county post offices annually. Gentry County is a county located in the northwestern portion of the U.S. state of Missouri. As of the 2010 census, the population was 6,738. Its county seat is Albany. The county was organized February 14, 1841 and named for Colonel Richard Gentry of Boone County who fell in the Seminole War in 1837."