Thornton is located in north Iowa. Thornton is between the Cerro Gordo, Franklin county. Thornton has 1.25 square miles of land area and has no water area. As of 2010-2014, the total Thornton population is 422, which has shrunk 0.00% since 2000. The population growth rate is much lower than the state average rate of 5.19% and is much lower than the national average rate of 11.61%. Thornton median household income is $41,563 in 2010-2014 and has grown by 18.33% since 2000. The income growth rate is much lower than the state average rate of 33.56% and is lower than the national average rate of 27.36%. Thornton median house value is $69,600 in 2010-2014 and has grown by 50.98% since 2000. The house value growth rate is about the same as the state average rate of 53.09% 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 Thornton is much better than the state average in quality. The Thornton area code is 641.