Moses lake is located in Grant county Washington with a geographic area of 17.9 square miles. The total population in Moses lake is 23,442 with 46.9% male and 53.1% female. Children under age 5 represent 8.2% of the population, under age 18 equal 29.2% of the population and over age 65 is 15.0% of the population. The median household income is $60,136, per capita income is $26,526. There are a total of 8,283 housing units with 59.8% owner occupied. Education includes 22.2% of residents that are high school graduates and 25.5% with a bachelor's degree or higher. The average temperature in Moses lake in the summer is 72 degrees, and in the winter 42 degrees.