Jefferson is located in Jefferson county Louisiana with a geographic area of 2.7 square miles. The total population in Jefferson is 10,286 with 48.8% male and 51.2% female. Children under age 5 represent 3.9% of the population, under age 18 equal 14.1% of the population and over age 65 is 21.2% of the population. The median household income is $46,405, per capita income is $34,135. There are a total of 5,155 housing units with 47.3% owner occupied. Education includes 31.8% of residents that are high school graduates and 30.9% with a bachelor's degree or higher. The average temperature in Jefferson in the summer is 81 degrees, and in the winter 51 degrees.