Erma is located in south New Jersey. Erma is part of Cape May County. Erma has 3.26 square miles of land area and 0.10 square miles of water area. As of 2010-2014, the total Erma population is 2,082, which has shrunk 0.29% 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%. Erma median household income is $83,095 in 2010-2014 and has grown by 29.31% since 2000. The income growth rate is about the same as the state average rate of 30.67% and is higher than the national average rate of 27.36%. Erma median house value is $291,300 in 2010-2014 and has grown by 150.69% since 2000. The house value growth rate is much higher 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 Erma is worse than the state average in quality.