Westfield is located in west Iowa. Westfield is part of Plymouth County. Westfield has 0.13 square miles of land area and has no water area. As of 2010-2014, the total Westfield population is 175, which has shrunk 7.41% 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%. Westfield median household income is $40,833 in 2010-2014 and has grown by 41.15% 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%. Westfield median house value is $64,000 in 2010-2014 and has grown by 113.33% 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 Westfield is much better than the state average in quality. The Westfield area code is 712.