Clay center is located in Clay county Nebraska with a geographic area of 0.7 square miles. The total population in Clay center is 859 with 48.1% male and 51.9% female. Children under age 5 represent 8.8% of the population, under age 18 equal 21.7% of the population and over age 65 is 21.1% of the population. The median household income is $61,146, per capita income is $28,800. There are a total of 381 housing units with 78.0% owner occupied. Education includes 38.3% of residents that are high school graduates and 25.2% with a bachelor's degree or higher. The average temperature in Clay center in the summer is 74 degrees, and in the winter 26 degrees.