Port st. lucie is located in St. lucie county Florida with a geographic area of 119.2 square miles. The total population in Port st. lucie is 195,773 with 49.0% male and 51.0% female. Children under age 5 represent 5.2% of the population, under age 18 equal 21.7% of the population and over age 65 is 20.5% of the population. The median household income is $62,380, per capita income is $29,081. There are a total of 68,241 housing units with 78.8% owner occupied. Education includes 26.6% of residents that are high school graduates and 25.5% with a bachelor's degree or higher. The average temperature in Port st. lucie in the summer is 80 degrees, and in the winter 56 degrees.