There are 6 US Post Offices in Mono County serving a total of 12,698 residents equating to 2,116 residents per post office. It's estimated that approximately 20,267 packages are handled across the 6 county post offices annually. Mono County /\u02c8mo\u028ano\u028a/(MOH-noh) is a county located in the east central portion of the U.S. state of California. As of the 2010 census, the population was 14,202. making it the fifth-least populous county in California. The county seat is Bridgeport. The county is located east of the Sierra Nevada between Yosemite National Park and Nevada. The only incorporated town in the county is Mammoth Lakes, which is located at the foot of Mammoth Mountain. Other locations, such as June Lake, are also famous as skiing and fishing resorts. Located in the middle of the county is Mono Lake, a vital habitat for millions of migratory and nesting birds. The lake is located in a wild natural setting, with pinnacles of tufa arising out of the salty and alkaline lake. Also located in Mono County is Bodie, the official state gold rush ghost town, which is now a California State Historic Park."