Hartwick is located in east Iowa. Hartwick is between the Poweshiek, Iowa county. Hartwick has 0.13 square miles of land area and has no water area. As of 2010-2014, the total Hartwick population is 75, which has shrunk 9.64% 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%. Hartwick median household income is $61,250 in 2010-2014 and has grown by 68.97% 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%. Hartwick median house value is $73,800 in 2010-2014 and has grown by 36.41% 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 Hartwick is much better than the state average in quality. The Hartwick area code is 319.