Lacey is located in Thurston county Washington with a geographic area of 17.2 square miles. The total population in Lacey is 50,827 with 47.3% male and 52.7% female. Children under age 5 represent 6.7% of the population, under age 18 equal 21.1% of the population and over age 65 is 18.5% of the population. The median household income is $69,752, per capita income is $33,208. There are a total of 20,214 housing units with 56.8% owner occupied. Education includes 18.9% of residents that are high school graduates and 36.3% with a bachelor's degree or higher. The average temperature in Lacey in the summer is 61 degrees, and in the winter 42 degrees.