Plymouth (formerly, Puckerville, Pokerville, and Poker Camp) is a city in Amador County, California, United States. The population was 980 at the 2000 census. The town was originally named Pokerville, when it was settled during the time of the Gold Rush. Plymouth is commonly know known as a "Gateway to Shenandoah Valley"; a popular wine producing region in the Sierra foothills. The Ione Band of Miwok Indians, a federally recognized tribe of Miwok people, is headquartered in Plymouth.