1. Wendy's
   Taco Bell
2. Wawa
   In-N-Out Burger

Taco Bell has over 7,000 restaurants and serves over 2 billion customers a year. They serve Tex-Mex style fast food.

1. Burger King
   Jimmy Johns
2. McDonald's
   Subway

McDonald's has over 14,000 restaurants in the US alone. They also have a presence in over 100 countries around the world, where they serve unique items to suit different global tastes and cultures.

1. Starbucks
   McDonald's
2. Subway
   Dairy Queen

Dairy Queen is over 70 years old. Today there are more than 6,000 stores around the globe.

1. Subway
   Carl's Jr.
2. Pizza Hut
   WingStreet

Subway is the largest restaurant chain on earth. It has over 44,000 stores and about half of them are in the US.

1. Jimmy John's
   Carrow's
2. Shake Shack
   Whataburger

Jimmy John's boasts minimally-processed, hormone-free food. It has over 2,000 locations.

1. Jack In The Box
   Sheetz
2. Taco Bell
   Burger King

Nearly 2 million burgers are sold in Burger King stores globally every day. In Australia, the chain is known as Hungry Jack's.

1. Whataburger
   Wendy's
2. Nando's
   Luby's

Wendy's was founded in Ohio. It's the third-largest hamburger fast food chain following McDonald's and Burger King.

1. Cookout
   Spangles
2. Sonic Drive-In
   McDonald's

Sonic has been in operation since the 1950s. They are known for using roller skating carhops to deliver food.

1. Umami Burger
   Shake Shack
2. Saladworks
   Taco Bell

Shake Shack was founded in New York City in 2004. It has expanded to include stores all over the world, with restaurants across the U.S., Asia and even in Russia.

1. Cold Stone Creamery
   Johnny Rockets
2. Dunkin' Donuts
   Auntie Anne's

This ice cream parlor chain was founded in 1988. Its signature ice cream is roughly 12-14 percent butterfat.

1. Domino's Pizza
   Arby's
2. Au Bon Pain
   Starbucks

The first Arby's opened in Ohio in 1964. There are restaurants all over the world; the oldest international Arby's is in Japan.

1. Whataburger
   Shake Shack
2. Del Taco
   Popeyes Louisiana Kitchen

Popeyes was founded in New Orleans, Louisana, in 1972 and is now one of the largest fast food chicken restaurants on earth. It has over 2,000 locations worldwide.

1. Sbarro
   Panda Express
2. Potbelly Sandwich Works
   Panera

Panda Express has over 1,900 restaurants located all over the world. It's the largest fast food chain selling American Chinese cuisine.

1. Steak Escape
   Panda Express
2. Del Taco
   Cinnabon

Cinnabon stores are generally found in malls and airports. There are locations in over two dozen countries.

1. Steak n' Shake
   Baja Fresh
2. Church's Chicken
   McDonald's

Baja Fresh was founded in California in 1990. It has less than 200 stores globally. Almost all are in the Unites States with locations in Dubai and Singapore.

1. Checkers
   The Halal Guys
2. Famous Dave's
   Twin Peaks

Checkers has stores in nearly 30 U.S. states and the District of Columbia. It was founded in Alabama in 1986.

1. In-N-Out Burger
   KFC
2. Pizza Hut
   Arby's

The first In-N-Out Burger opened in California in 1948. The chain is famous for their not-so-secret secret menu.

1. Dunkin' Donuts
   Wendy's
2. Sonic
   Starbucks

The first ever Starbucks opened in Seattle, Washington, in 1971. Following the United States, China has the most Starbucks stores of any country.

1. Burger King
   Church's Chicken
2. Auntie Anne's
   Jack In The Box

Auntie Anne's began as a stand at a Pennsylvania Farmer's Market in 1988. It has more than 1,500 global locations and 400 around the world.

1. Starbucks
   Dunkin' Donuts
2. Wendy's
   Baja Fresh

Founded in 1950, Dunkin' Donuts has become one of the largest coffee and baked goods chains on the planet. You can visit one of its thousands of stores in more than 30 countries.

1. Fatburger
   Rax
2. Famous Dave's
   Boston Market

Boston Market was founded in 1984 and expanded rapidly in the '90s. Most of its roughly 500 stores can be found in the northeastern United States.

1. Starbucks
   Krispy Kreme Doughnuts
2. Baja Fresh
   Shake Shack

This chain was founded in North Carolina in the 1930s. Today there are over 1,000 stores.

1. Chick-fil-A
   Saladworks
2. Wendy's
   Carl's Jr.

This restaurant chain was founded in 1946. The company culture is influenced by the Southern Baptist beliefs of founder S. Truett Cathy. It is closed on Sundays and came under fire in 2011 for donating millions to groups opposed to same-sex marriage.

1. White Castle
   Jack In The Box
2. Bueno Nacho
   Five Guys

White Castle in known for its unique square burgers. Its stores are mostly in Midwestern and Mid-Atlantic States.

1. Wendy's
   Steak 'n Shake
2. Saladworks
   Dunkin' Donuts

This chain was founded in 1934. Today most of the restaurants are located in the Southern and Midwestern U.S., but it can be found in Europe and the Middle East.

1. Captain D's Seafood Grill
   Church's Chicken
2. Checkers
   Del Taco

Founded in 1952 in Texas, this chain has become one of the largest fried chicken franchises on earth. There are locations in 25 countries, in some of which the chain is called Texas Chicken.

1. Taco John's
   Panera
2. Blimpie
   McDonald's

Blimpie was founded in 1964 by a group of friends. While it boomed in the '90s, Blimpie has struggled to stay afloat in recent years.

1. Taco Bell
   Five Guys
2. Chipotle
   Saladworks

The first Five Guys ever opened in Virginia in 1986. While it has been one of the fastest-growing fast food chains, it has also been criticized for being some of the most unhealthy fast food available. A large order of fries alone has over 1,000 calories.

1. KFC
   Popeye's
2. Wawa
   Dunkin' Donuts

KFC is based in Louisville, Kentucky. Today it has more than 20,000 stores operating in 125 countries around the world.

1. Tim Horton's
   Starbucks
2. Wendy's
   Burger King

This Canadian chain restaurant is known for its coffee and donuts. There are stores in nine countries.

1. Dairy Queen
   Carl's Jr.
2. Country Buffet
   Panera

This restaurant started as a Los Angeles food cart operated by a husband and wife team in 1941. Today, it has restaurants in over 40 U.S. states and 30 countries.

1. Dunkin' Donuts
   Au Bon Pain
2. Taco Bell
   Sheetz

Au Bon Pain was founded in Boston in 1977. This casual bakery chain has restaurants in the U.S., Thailand and India.

1. Quizno's
   Baja Fresh
2. Cinnabon
   Spangles

The first Quizno's was opened in Denver, Colorado, in 1981. It's the second biggest submarine sandwich shop in North America, after Subway.

1. Quizno's
   Sbarro
2. FatBurger
   Checkers

Sbarro was founded in Brooklyn, New York City in 1956. It specializes in New York Style Pizza and has 800 locations globally, including some in The Pentagon and naval bases.

1. Saladworks
   Panera
2. Arby's
   Skyline Chili

Saladworks currently has about 100 U.S. locations in about 15 states. The first ever Saladworks opened in the Cherry Hill Mall in New Jersey in 1986.