Londonderry is located in south New Hampshire. Londonderry is part of Rockingham County. Londonderry has 12.31 square miles of land area and 0.02 square miles of water area. As of 2010-2014, the total Londonderry population is 10,637, which has shrunk 6.83% since 2000. The population growth rate is much lower than the state average rate of 6.90% and is much lower than the national average rate of 11.61%. Londonderry median household income is $90,252 in 2010-2014 and has grown by 31.36% since 2000. The income growth rate is lower than the state average rate of 33.39% and is higher than the national average rate of 27.36%. Londonderry median house value is $272,300 in 2010-2014 and has grown by 74.55% since 2000. The house value growth rate is about the same as the state average rate of 78.09% 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 Londonderry is much better than the state average in quality. The Londonderry area code is 603.