List of parishes in Louisiana
The U.S. state of Louisiana is divided into 64 parishes (French: "paroisses") in the same manner that 48 other states of the United States are divided into counties, and Alaska is divided into boroughs.
Lake Pontchartrain
In descending order of area, the lake is located in parts of six Louisiana parishes: St. Tammany, Orleans, Jefferson, St. John the Baptist, St. Charles, and Tangipahoa. The water boundaries were defined in 1979 (see list of parishes in Louisiana).