Altoona is located close to the center of Iowa. Altoona is part of Polk County. Altoona has 9.35 square miles of land area and has no water area. As of 2010-2014, the total Altoona population is 15,317, which has grown 48.06% since 2000. The population growth rate is much higher than the state average rate of 5.19% and is much higher than the national average rate of 11.61%. Altoona median household income is $66,730 in 2010-2014 and has grown by 33.03% since 2000. The income growth rate is about the same as the state average rate of 33.56% and is higher than the national average rate of 27.36%. Altoona median house value is $158,800 in 2010-2014 and has grown by 37.37% since 2000. The house value growth rate is lower than the state average rate of 53.09% and is 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 Altoona is much better than the state average in quality. The Altoona area code is 515.