Marathon is located in northwest Iowa. Marathon is between the Buena Vista, Clay county. Marathon has 0.74 square miles of land area and has no water area. As of 2010-2014, the total Marathon population is 286, which has shrunk 5.30% 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%. Marathon median household income is $42,250 in 2010-2014 and has grown by 101.36% 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%. Marathon median house value is $23,600 in 2010-2014 and has grown by 45.68% 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 Marathon is much better than the state average in quality. The Marathon area code is 712.