There are 150 Fast Food Restaurants in Johnson County, Kansas, serving a population of 578,797 people in an area of 474 square miles. There is 1 Fast Food Restaurant per 3,858 people, and 1 Fast Food Restaurant per 3 square miles.
In Kansas, Johnson County is ranked 70th of 105 counties in Fast Food Restaurants per capita, and 1st of 105 counties in Fast Food Restaurants per square mile.