Plymouth is located close to the center of California. Plymouth is part of Amador County. Plymouth has 0.93 square miles of land area and 0.01 square miles of water area. As of 2010-2014, the total Plymouth population is 1,185, which has grown 20.92% since 2000. The population growth rate is much higher than the state average rate of 12.39% and is much higher than the national average rate of 11.61%. Plymouth median household income is $44,531 in 2010-2014 and has grown by 19.51% since 2000. The income growth rate is much lower than the state average rate of 29.47% and is lower than the national average rate of 27.36%. Plymouth median house value is $176,200 in 2010-2014 and has grown by 46.96% since 2000. The house value growth rate is much lower than the state average rate of 75.60% and is about the same as the national average rate of 46.91%. As a reference, the national Consumer Price Index (CPI) inflation rate for the same period is 26.63%. On average, the public school district that covers Plymouth is better than the state average in quality. The Plymouth area code is 209.