The U.S. state of Louisiana has a total of nine Metropolitan Statistical Areas (MSAs). Thirty (30) of Louisiana's sixty-four (64) parishes are classified as metropolitan. As of the 2010 census, these parishes had a combined population of 3,340,667 (74.8% of the state's population). Based on a July 1, 2009, population estimate, that figure had increased to 3,356,913 (74.7% of the state's population). 
The following table lists Louisiana's metropolitan areas, ranked by population as of February 1, 2013.
|1||46||New Orleans–Metairie–Kenner||(7); Jefferson, Orleans, Plaquemines, St. Bernard, St. Charles, St. John the Baptist, St. Tammany||1,189,981|
|2||66||Baton Rouge||(9); Ascension, East Baton Rouge, East Feliciana, Iberville, Livingston, Pointe Coupee, St. Helena, West Baton Rouge, West Feliciana||786,947|
|3||130||Shreveport–Bossier City||(3); Bossier, Caddo, De Soto||391,516|
|4||172||Lafayette||(2); Lafayette, St. Martin||273,738|
|5||204||Houma–Bayou Cane–Thibodaux||(2); Lafourche, Terrebonne||209,001|
|6||217||Lake Charles||(2); Calcasieu, Cameron||199,607|
|7||229||Monroe||(2); Ouachita, Union||176,441|
|8||255||Alexandria||(2); Grant, Rapides||153,922|
|Note: The New Orleans–Metairie–Kenner was significantly affected by Hurricane Katrina in August 2005 which resulted in a significant loss of population.|
- "Table 1. Annual Estimates of the Population for Parishes of Louisiana: April 1, 2000 to July 1, 2009" ( CSV). 2008 Population. United States Census Bureau, Population Division. 2010-03-23. Retrieved 2010-03-30.