There are 212 Fast Food Restaurants in Ada County, Idaho, serving a population of 435,117 people in an area of 1,053 square miles. There is 1 Fast Food Restaurant per 2,052 people, and 1 Fast Food Restaurant per 4 square miles.
In Idaho, Ada County is ranked 21st of 44 counties in Fast Food Restaurants per capita, and 1st of 44 counties in Fast Food Restaurants per square mile.