There are 116 Fast Food Restaurants in St. Lucie County, Florida, serving a population of 298,763 people in an area of 572 square miles. There is 1 Fast Food Restaurant per 2,575 people, and 1 Fast Food Restaurant per 4 square miles.
In Florida, St. Lucie County is ranked 28th of 67 counties in Fast Food Restaurants per capita, and 14th of 67 counties in Fast Food Restaurants per square mile.