While Mardi Gras and New Orleans often go hand in hand, the colorful celebration is not limited to just one city or state. All across the United States, people don. The Mardi Gras celebration takes place in many cities throughout the USA, especially New Orleans, which is known as the Mardi Gras city. Mardi Gras in the United States is not observed nationally across the country, however a number of cities and regions in the U.S. have notable Carnival Early days in American · Alabama · Florida · Louisiana. University of Alabama Press. The Supreme Court refused to hear the city's appeal of their decision. Mardi Gras in New Orleans for Kids Best Hotels for Mardi Gras in New Orleans Mardi Gras for Beginners New Orleans Mardi Gras Krewes in Order of Appearance Mardi Gras Indians. In the early s Louisiana's governor, the Marquis de Vaudreuil, established elegant society balls, which became the model for the New Orleans Mardi Gras balls of today. Louisiana is the only state in which Mardi Gras is a legal holiday.