51231 Zip Code
51231 zip code is located in northwest Iowa. 51231 zip code is part of Obrien County. 51231 zip code has 28.20 square miles of land area and has no water area. As of 2010-2014, the total 51231 zip code population is 362, which has grown 29.29% since 2000. The population growth rate is much higher than the state average rate of 5.19% and is much higher than the national average rate of 11.61%. 51231 zip code median household income is $74,271 in 2010-2014 and has grown by 83.76% 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%. 51231 zip code median house value is $47,100 in 2010-2014 and has grown by 16.01% since 2000. The house value growth rate is much lower than the state average rate of 53.09% and is much 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 51231 zip code is much better than the state average in quality. The 51231 zip code area code is 712.
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