Erin is located close to the center of Tennessee. Erin is between the Houston, Humphreys, Montgomery county. Erin has 4.09 square miles of land area and 0.00 square miles of water area. As of 2010-2014, the total Erin population is 1,451, which has shrunk 2.62% since 2000. The population growth rate is much lower than the state average rate of 13.40% and is much lower than the national average rate of 11.61%. Erin median household income is $32,688 in 2010-2014 and has grown by 41.46% since 2000. The income growth rate is much higher than the state average rate of 22.72% and is much higher than the national average rate of 27.36%. Erin median house value is $81,100 in 2010-2014 and has grown by 55.66% since 2000. The house value growth rate is higher than the state average rate of 50.43% and is 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 Erin is much better than the state average in quality. The Erin area code is 931.