Cromwell is located in southwest Iowa. Cromwell is part of Union County. Cromwell has 0.29 square miles of land area and has no water area. As of 2010-2014, the total Cromwell population is 87, which has shrunk 27.50% 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%. Cromwell median household income is $51,250 in 2010-2014 and has grown by 46.43% 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%. Cromwell median house value is $65,500 in 2010-2014 and has grown by 96.11% since 2000. The house value growth rate is much higher than the state average rate of 53.09% and is much 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 Cromwell is much better than the state average in quality. The Cromwell area code is 641.