Middletown is located in Lake county California with a geographic area of 1.8 square miles. The total population in Middletown is 725 with 35.7% male and 64.3% female. Children under age 5 represent 0.0% of the population, under age 18 equal 31.7% of the population and over age 65 is 17.9% of the population. The median household income is $144,696, per capita income is $53,114. There are a total of 306 housing units with 38.2% owner occupied. Education includes 11.8% of residents that are high school graduates and 29.1% with a bachelor's degree or higher. The average temperature in Middletown in the summer is 76 degrees, and in the winter 43 degrees.
