Belfast is located in south Maine. Belfast is part of Waldo County. Belfast has 34.04 square miles of land area and 4.33 square miles of water area. As of 2010-2014, the total Belfast population is 6,664, which has grown 4.44% since 2000. The population growth rate is about the same as the state average rate of 4.21% and is much lower than the national average rate of 11.61%. Belfast median household income is $34,205 in 2010-2014 and has grown by 5.57% since 2000. The income growth rate is much lower than the state average rate of 31.05% and is much lower than the national average rate of 27.36%. Belfast median house value is $183,400 in 2010-2014 and has grown by 69.50% since 2000. The house value growth rate is lower than the state average rate of 75.89% 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 Belfast is worse than the state average in quality. The Belfast area code is 207.