There are 113 Fast Food Restaurants in Jefferson County, Colorado, serving a population of 564,029 people in an area of 765 square miles. There is 1 Fast Food Restaurant per 4,991 people, and 1 Fast Food Restaurant per 6 square miles.
In Colorado, Jefferson County is ranked 49th of 64 counties in Fast Food Restaurants per capita, and 4th of 64 counties in Fast Food Restaurants per square mile.