Preston is located close to the center of Maryland. Preston is part of Caroline County. Preston has 0.57 square miles of land area and 0.00 square miles of water area. As of 2010-2014, the total Preston population is 967, which has grown 70.85% since 2000. The population growth rate is much higher than the state average rate of 11.16% and is much higher than the national average rate of 11.61%. Preston median household income is $60,179 in 2010-2014 and has grown by 25.05% since 2000. The income growth rate is much lower than the state average rate of 40.25% and is lower than the national average rate of 27.36%. Preston median house value is $197,400 in 2010-2014 and has grown by 91.28% since 2000. The house value growth rate is lower than the state average rate of 96.92% and is much 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 Preston is close to the state average in quality. The Preston area code is 410.