There are 307 Fast Food Restaurants in Contra Costa County, California, serving a population of 1,123,678 people in an area of 723 square miles. There is 1 Fast Food Restaurant per 3,660 people, and 1 Fast Food Restaurant per 2 square miles.
In California, Contra Costa County is ranked 47th of 58 counties in Fast Food Restaurants per capita, and 6th of 58 counties in Fast Food Restaurants per square mile.