Allison is located close to the center of Iowa. Allison is part of Butler County. Allison has 2.93 square miles of land area and has no water area. As of 2010-2014, the total Allison population is 1,184, which has grown 17.69% 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%. Allison median household income is $50,885 in 2010-2014 and has grown by 48.19% since 2000. The income growth rate is higher than the state average rate of 33.56% and is much higher than the national average rate of 27.36%. Allison median house value is $79,200 in 2010-2014 and has grown by 46.94% since 2000. The house value growth rate is lower than the state average rate of 53.09% and is about the same as 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 Allison is much better than the state average in quality. The Allison area code is 319.