Zillah is located in Yakima county Washington with a geographic area of 1.8 square miles. The total population in Zillah is 3,137 with 49.0% male and 51.0% female. Children under age 5 represent 10.5% of the population, under age 18 equal 28.7% of the population and over age 65 is 16.9% of the population. The median household income is $63,750, per capita income is $27,723. There are a total of 1,174 housing units with 60.6% owner occupied. Education includes 18.2% of residents that are high school graduates and 21.0% with a bachelor's degree or higher. The average temperature in Zillah in the summer is 67 degrees, and in the winter 42 degrees.
