A chili dog is a hot dog

Hot dog

A hot dog is a sausage served in a sliced bun. It is very often garnished with mustard, ketchup, onions, mayonnaise, relish and/or sauerkraut.-History:...

 that is served topped with chili con carne

Chili con carne

Chili con carne is a spicy stew. The name of the dish derives from the Spanish chile con carne, "chili pepper with meat". Traditional versions are made, minimally, from chili peppers, garlic, onions, and cumin, along with chopped or ground beef. Beans and tomatoes are frequently included...

 (usually without beans). Often, other toppings are also added, such as cheese

Cheese

Cheese is a generic term for a diverse group of milk-based food products. Cheese is produced throughout the world in wide-ranging flavors, textures, and forms....

, onions, and mustard

Mustard (condiment)

Mustard is a condiment made from the seeds of a mustard plant...

. One popular variety of chili dog is the Coney dog, which despite its name originally came from Michigan

Michigan

Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake"....

 and not Brooklyn

Brooklyn

Brooklyn is the most populous of New York City's five boroughs, with nearly 2.6 million residents, and the second-largest in area. Since 1896, Brooklyn has had the same boundaries as Kings County, which is now the most populous county in New York State and the second-most densely populated...

. A Coney dog is a hot dog piled high with chili, onions and mustard.
A Michigan dog is similar to a Coney, as is a Texas hot dog, which is ironically from Pennsylvania.

Chili dogs are also popular in areas that have large Mexican-American populations, such as California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

, Texas

Texas

Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

 and Arizona

Arizona

Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

. In California, regional chains such as Pink's

Pink's Hot Dogs

Pink's Hot Dogs is a landmark hot dog restaurant in the Hollywood district of the city of Los Angeles.- History :Pink's was founded by Paul and Betty Pink in 1939 as a pushcart near the corner of La Brea and Melrose. The Great Depression was still having an impact on the country, and money was scarce...

 and Original Tommy's specialize in chili dogs and chili burgers. A major difference between chili dogs in the Southwestern United States and Coneys is that Southwestern chili dogs have spicier chili and are served with brown mustard or no mustard at all, whereas Coneys have spicier dogs and are usually served with yellow mustard. A Sonoran dog, served in Arizona, is a chili dog that also contains bacon

Bacon

Bacon is a cured meat prepared from a pig. It is first cured using large quantities of salt, either in a brine or in a dry packing; the result is fresh bacon . Fresh bacon may then be further dried for weeks or months in cold air, boiled, or smoked. Fresh and dried bacon must be cooked before eating...

 and salsa

Salsa (sauce)

Salsa may refer to any type of sauce. In American English, it usually refers to the spicy, often tomato based, hot sauces typical of Mexican and Central American cuisine, particularly those used as dips. In British English, the word typically refers to salsa cruda, which is common in Mexican ,...

.