Lake arthur is located in Jefferson davis county Louisiana with a geographic area of 1.9 square miles. The total population in Lake arthur is 2,742 with 45.1% male and 54.9% female. Children under age 5 represent 7.3% of the population, under age 18 equal 25.6% of the population and over age 65 is 9.7% of the population. The median household income is $32,236, per capita income is $20,358. There are a total of 879 housing units with 61.4% owner occupied. Education includes 41.6% of residents that are high school graduates and 8.9% with a bachelor's degree or higher. The average temperature in Lake arthur in the summer is 81 degrees, and in the winter 51 degrees.