Gilman is located close to the center of Iowa. Gilman is between the Marshall, Jasper, Poweshiek, Tama county. Gilman has 0.54 square miles of land area and has no water area. As of 2010-2014, the total Gilman population is 692, which has grown 15.33% since 2000. The population growth rate is much higher than the state average rate of 5.19% and is higher than the national average rate of 11.61%. Gilman median household income is $54,375 in 2010-2014 and has grown by 62.20% since 2000. The income growth rate is much higher than the state average rate of 33.56% and is much higher than the national average rate of 27.36%. Gilman median house value is $74,400 in 2010-2014 and has grown by 34.05% since 2000. The house value growth rate is much 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 Gilman is much better than the state average in quality. The Gilman area code is 641.