Westfield is located in Plymouth county Iowa with a geographic area of 0.1 square miles. The total population in Westfield is 120 with 38.3% male and 61.7% female. Children under age 5 represent 1.7% of the population, under age 18 equal 24.2% of the population and over age 65 is 13.3% of the population. The median household income is $43,409, per capita income is $22,650. There are a total of 64 housing units with 75.0% owner occupied. Education includes 39.1% of residents that are high school graduates and 1.6% with a bachelor's degree or higher. The average temperature in Westfield in the summer is 72 degrees, and in the winter 23 degrees.