There are 5 US Post Offices in Pondera County serving a total of 6,263 residents equating to 1,253 residents per post office. It's estimated that approximately 9,996 packages are handled across the 5 county post offices annually. Pondera County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 6,153. Its county seat is Conrad."