Jarrettsville is located in Harford county Maryland with a geographic area of 8.6 square miles. The total population in Jarrettsville is 2,827 with 49.5% male and 50.5% female. Children under age 5 represent 5.4% of the population, under age 18 equal 19.2% of the population and over age 65 is 23.3% of the population. The median household income is $117,833, per capita income is $46,717. There are a total of 988 housing units with 82.1% owner occupied. Education includes 16.0% of residents that are high school graduates and 46.2% with a bachelor's degree or higher. The average temperature in Jarrettsville in the summer is 74 degrees, and in the winter 37 degrees.