Jefferson Parish (French: Paroisse de Jefferson; Spanish: Parroquia de Jefferson) is a parish in the U.S. state of Louisiana. As of the 2020 U.S. census, the population was 440,781. The parish seat is Gretna. Jefferson Parish is included in the Greater New Orleans area.

LaPlace ( lə-PLAHSS) is a census-designated place (CDP) in St. John the Baptist Parish, Louisiana, United States, situated along the east bank of the Mississippi River, in the New Orleans metropolitan area. In 2020, it had a population of 28,841.LaPlace is the southern terminus of Interstate 55, where it joins with Interstate 10, and of US 51, where it terminates at the junction with US 61. LaPlace is located 25 miles (40 km) west of New Orleans.

Mandeville is a city in St. Tammany Parish, Louisiana, United States. The population was 11,560 at the 2010 U.S. census, and 13,192 at the 2020 United States census. Mandeville is located on the north shore of Lake Pontchartrain, south of Interstate 12. It is across the lake from the city of New Orleans and its south shore suburbs. It is part of the New Orleans–Metairie–Kenner metropolitan area.

The Cajuns (; Louisiana French: les Cadiens), also known as Acadians (Louisiana French: les Acadiens), are an ethnic group mainly living in the U.S. state of Louisiana. They also live in the Canadian maritimes provinces consisting in part of the descendants of the original Acadian exiles—French-speakers from Acadia (L'Acadie) in what are now the Maritimes of Eastern Canada. In Louisiana, Acadian and Cajun are often used as broad cultural terms without reference to actual descent from the deported Acadians. Historically, Louisianians of Acadian descent were also considered to be Louisiana Creoles, although Cajun and Creole are often portrayed as separate identities today. Most Cajuns are of French descent. The Cajuns make up a significant portion of south Louisiana's population and have had an enormous impact on the state's culture.While Lower Louisiana had been settled by French colonists since the late 17th century, the Cajuns trace their roots to the influx of Acadian settlers after the Great Expulsion from their homeland during the French and British hostilities prior to the Seven Years' War (1756 to 1763). The Acadia region to which modern Cajuns trace their origin consisted largely of what are now Nova Scotia, New Brunswick, Prince Edward Island plus parts of eastern Quebec and northern Maine. Since their establishment in Louisiana, the Cajuns have become famous for their unique French dialect, Louisiana French (also called "Cajun French", although the dialect predates the Acadians' arrival in Louisiana), and have developed a vibrant culture including folkways, music, and cuisine. The Acadiana region is heavily associated with them.