20670 Zip Code
20670 zip code is located close to the center of Maryland. 20670 zip code is part of Saint Marys County. 20670 zip code has 9.43 square miles of land area and 5.65 square miles of water area. As of 2010-2014, the total 20670 zip code population is 1,421, which has shrunk 49.93% since 2000. The population growth rate is much lower than the state average rate of 11.16% and is much lower than the national average rate of 11.61%. 20670 zip code median household income is $63,281 in 2010-2014 and has grown by 108.19% since 2000. The income growth rate is much higher than the state average rate of 40.25% and is much higher than the national average rate of 27.36%. 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 20670 zip code is better than the state average in quality. The 20670 zip code area code is 301.