 So what is America's number one fast food restaurant? After nearly a decade on top, Chick-fil-A no longer rules the roost. This according to a new reader survey by USA Today. Mexican chain Del Taco was voted as the best fast food chain of 2024. Del Taco, you're hot stuff. KFC came in next and then Chick-fil-A at number three, rounding out the top five. In-N-Out Burger and then Hardee's.