Pennington is located close to the center of New Jersey. Pennington is part of Mercer County. Pennington has 0.96 square miles of land area and 0.00 square miles of water area. As of 2010-2014, the total Pennington population is 2,588, which has shrunk 4.01% since 2000. The population growth rate is much lower than the state average rate of 5.47% and is much lower than the national average rate of 11.61%. Pennington median household income is $116,583 in 2010-2014 and has grown by 29.01% since 2000. The income growth rate is lower than the state average rate of 30.67% and is higher than the national average rate of 27.36%. Pennington median house value is $515,100 in 2010-2014 and has grown by 81.50% since 2000. The house value growth rate is lower than the state average rate of 87.30% 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 Pennington is much better than the state average in quality. The Pennington area code is 609.