Mesa is located in Franklin county Washington with a geographic area of 1.7 square miles. The total population in Mesa is 713 with 60.2% male and 39.8% female. Children under age 5 represent 8.7% of the population, under age 18 equal 47.8% of the population and over age 65 is 2.2% of the population. The median household income is $60,000, per capita income is $12,368. There are a total of 136 housing units with 46.3% owner occupied. Education includes 27.9% of residents that are high school graduates and 7.4% with a bachelor's degree or higher. The average temperature in Mesa in the summer is 68 degrees, and in the winter 42 degrees.