Marlborough is located in southwest New Hampshire. Marlborough is part of Cheshire County. Marlborough has 1.69 square miles of land area and has no water area. As of 2010-2014, the total Marlborough population is 986, which has shrunk 9.46% 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%. Marlborough median household income is $46,094 in 2010-2014 and has grown by 23.23% since 2000. The income growth rate is lower than the state average rate of 33.39% and is lower than the national average rate of 27.36%. Marlborough median house value is $196,400 in 2010-2014 and has grown by 127.31% since 2000. The house value growth rate is much higher than 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 Marlborough is much better than the state average in quality. The Marlborough area code is 603.