Gratis is located in southwest Ohio. Gratis is part of Preble County. Gratis has 0.96 square miles of land area and 0.00 square miles of water area. As of 2010-2014, the total Gratis population is 925, which has shrunk 0.96% since 2000. The population growth rate is lower than the state average rate of 1.83% and is much lower than the national average rate of 11.61%. Gratis median household income is $50,000 in 2010-2014 and has grown by 36.90% since 2000. The income growth rate is much higher than the state average rate of 19.27% and is higher than the national average rate of 27.36%. Gratis median house value is $100,500 in 2010-2014 and has grown by 25.31% since 2000. The house value growth rate is about the same as the state average rate of 24.98% and is much lower 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 Gratis is worse than the state average in quality. The Gratis area code is 937.