Americans love fast food.

The top 15 fast food chains in the nation raked in a combined $115 billion in sales last year, and their 105,000 total stores blanket the landscape.

We asked food industry research firm Technomic to put together a list of the biggest fast food brands in America.

They're defined as LSRs — "limited service restaurants" — which include burger joints, sandwich shops, coffee cafés, pizza places and more.