Fostoria is located in Clay county Iowa with a geographic area of 0.4 square miles. The total population in Fostoria is 180 with 51.1% male and 48.9% female. Children under age 5 represent 3.3% of the population, under age 18 equal 11.1% of the population and over age 65 is 15.0% of the population. The median household income is $75,625, per capita income is $34,604. There are a total of 84 housing units with 85.7% owner occupied. Education includes 29.8% of residents that are high school graduates and 20.2% with a bachelor's degree or higher. The average temperature in Fostoria in the summer is 71 degrees, and in the winter 23 degrees.