Larkspur is located in west California. Larkspur is part of Marin County. Larkspur has 3.03 square miles of land area and 0.22 square miles of water area. As of 2010-2014, the total Larkspur population is 12,131, which has grown 0.97% since 2000. The population growth rate is much lower than the state average rate of 12.39% and is much lower than the national average rate of 11.61%. Larkspur median household income is $82,568 in 2010-2014 and has grown by 23.77% since 2000. The income growth rate is lower than the state average rate of 29.47% and is lower than the national average rate of 27.36%. Larkspur median house value is $1,000,001 in 2010-2014 and has grown by 50.83% since 2000. The house value growth rate is lower than the state average rate of 75.60% and is higher than 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 Larkspur is much better than the state average in quality. The Larkspur area code is 415.