Elmer is located in southwest New Jersey. Elmer is part of Salem County. Elmer has 0.87 square miles of land area and 0.01 square miles of water area. As of 2010-2014, the total Elmer population is 1,375, which has shrunk 0.65% 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%. Elmer median household income is $70,625 in 2010-2014 and has grown by 52.96% since 2000. The income growth rate is much higher than the state average rate of 30.67% and is much higher than the national average rate of 27.36%. Elmer median house value is $191,400 in 2010-2014 and has grown by 84.22% since 2000. The house value growth rate is about the same as 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 Elmer is worse than the state average in quality. The Elmer area code is 856.