Rolla is located close to the center of Missouri. Rolla is between the Phelps, Dent county. Rolla has 11.83 square miles of land area and 0.02 square miles of water area. As of 2010-2014, the total Rolla population is 19,808, which has grown 21.02% since 2000. The population growth rate is much higher than the state average rate of 7.74% and is much higher than the national average rate of 11.61%. Rolla median household income is $32,478 in 2010-2014 and has grown by 22.66% since 2000. The income growth rate is lower than the state average rate of 25.91% and is lower than the national average rate of 27.36%. Rolla median house value is $118,400 in 2010-2014 and has grown by 50.44% since 2000. The house value growth rate is about the same as the state average rate of 52.06% 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 Rolla is much better than the state average in quality. The Rolla area code is 573.