21770 Zip Code
21770 zip code is located close to the center of Maryland. 21770 zip code is part of Frederick County. 21770 zip code has 11.00 square miles of land area and 0.01 square miles of water area. As of 2010-2014, the total 21770 zip code population is 5,457, which has shrunk 0.05% 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%. 21770 zip code median household income is $111,677 in 2010-2014 and has grown by 43.57% since 2000. The income growth rate is higher than the state average rate of 40.25% and is much higher than the national average rate of 27.36%. 21770 zip code median house value is $377,200 in 2010-2014 and has grown by 96.66% since 2000. The house value growth rate is about the same as 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 21770 zip code is better than the state average in quality. The 21770 zip code area code is 301.