Marrero is located in Jefferson county Louisiana with a geographic area of 7.2 square miles. The total population in Marrero is 31,751 with 46.5% male and 53.5% female. Children under age 5 represent 6.6% of the population, under age 18 equal 21.3% of the population and over age 65 is 18.2% of the population. The median household income is $46,330, per capita income is $24,184. There are a total of 12,184 housing units with 67.4% owner occupied. Education includes 32.3% of residents that are high school graduates and 11.2% with a bachelor's degree or higher. The average temperature in Marrero in the summer is 81 degrees, and in the winter 51 degrees.