There are 110 Fast Food Restaurants in San Luis Obispo County, California, serving a population of 280,119 people in an area of 3,300 square miles. There is 1 Fast Food Restaurant per 2,546 people, and 1 Fast Food Restaurant per 29 square miles.
In California, San Luis Obispo County is ranked 25th of 58 counties in Fast Food Restaurants per capita, and 33rd of 58 counties in Fast Food Restaurants per square mile.