There are 15 US Post Offices in Chemung County serving a total of 94,903 residents equating to 6,327 residents per post office. It's estimated that approximately 151,476 packages are handled across the 15 county post offices annually. Chemung County is a county located in the Southern Tier of the U.S. state of New York. As of the 2010 census, the population was 88,830. Its county seat is Elmira. Its name is derived from a Delaware Indian village whose name meant \"big horn\". Chemung County comprises the Elmira, NY Metropolitan Statistical Area, which is also included in the Elmira-Corning, NY Combined Statistical Area. Many signs posted along roads in Chemung County refer to the area as \"Mark Twain Country,\" because the noted author lived and wrote for many years in Elmira."