21031 Zip Code
21031 zip code is located close to the center of Maryland. 21031 zip code is part of Baltimore County. 21031 zip code has 0.97 square miles of land area and has no water area. As of 2010-2014, the total 21031 zip code population is 25, which has shrunk 57.63% 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%. On average, the public school district that covers 21031 zip code is close to the state average in quality. The 21031 zip code area code is 410.