Laplace is located in St. john the baptist county Louisiana with a geographic area of 20.9 square miles. The total population in Laplace is 29,232 with 47.7% male and 52.3% female. Children under age 5 represent 7.5% of the population, under age 18 equal 25.9% of the population and over age 65 is 12.7% of the population. The median household income is $62,383, per capita income is $28,991. There are a total of 10,478 housing units with 79.2% owner occupied. Education includes 30.5% of residents that are high school graduates and 20.0% with a bachelor's degree or higher. The average temperature in Laplace in the summer is 81 degrees, and in the winter 51 degrees.