Kilmarnock is located in Lancaster county Virginia with a geographic area of 3.4 square miles. The total population in Kilmarnock is 1,488 with 37.2% male and 62.8% female. Children under age 5 represent 10.6% of the population, under age 18 equal 19.6% of the population and over age 65 is 29.9% of the population. The median household income is $38,125, per capita income is $26,736. There are a total of 732 housing units with 49.3% owner occupied. Education includes 28.3% of residents that are high school graduates and 23.9% with a bachelor's degree or higher. The average temperature in Kilmarnock in the summer is 71 degrees, and in the winter 35 degrees.