Saint Louis, Saint-Louis or St. Louis commonly refers to:

• Louis IX of France, King of France from 1226 to 1270
• St. Louis, a city in Missouri, United States, named after the former

It may also refer to:

• Saint-Louis, Quebec, a municipality
• Saint-Louis-de-Blandford, Quebec, a small town northeast of Montreal
• Saint-Louis-de-France, Quebec, a former town merged into Trois-Rivières in 2002
• Saint-Louis-de-Gonzague, Chaudière-Appalaches, Quebec, a municipality in the Les Etchemins Regional County Municipality
• Saint-Louis-de-Gonzague, Montérégie, Quebec, a parish municipality in the Beauharnois-Salaberry Regional County Municipality
• Saint-Louis-de-Gonzague-du-Cap-Tourmente, a parish municipality in Quebec
• Saint-Louis-du-Ha! Ha!, a parish municipality in the Témiscouata Regional County Municipality in Quebec
• Lake Saint-Louis, a lake in southwestern Quebec
• Saint-Louis (provincial electoral district), a former electoral district in Montreal, Quebec
• Saint-Louis-de-Kent, New Brunswick, a village
• Saint-Louis Parish, New Brunswick
• St. Louis, Prince Edward Island, an unincorporated community
• Rural Municipality of St. Louis No. 431, Saskatchewan
  • St. Louis, Saskatchewan, a village

• Saint-Louis, Haut-Rhin, a commune in the Haut-Rhin département at the German and Swiss border
• Saint-Louis, Moselle, a commune in the Moselle département
• Saint-Louis, Guadeloupe, a commune in the overseas department of Guadeloupe
• Saint-Louis, New Caledonia, a settlement in the overseas collectivity of New Caledonia
• Saint-Louis, Réunion, commune in the overseas department of Réunion
• Île Saint-Louis, an island on the Seine in Paris
• Saint-Louis-de-Montferrand, Gironde
• Saint-Louis-en-l'Isle, Dordogne
• Saint-Louis-et-Parahou, Aude
• Saint-Louis-lès-Bitche, Moselle

• Saint-Louis-du-Sud, a commune in the Sud department of Haiti
• Saint-Louis-du-Nord, a commune in the Nord department of Haiti

• Saint Louis, Seychelles, an administrative district on the island of Mahé

• Saint-Louis, Senegal, capital city of the Saint-Louis Region
• Saint-Louis Region, a region on the border with Mauritania

• Saint Louis BTS station, a rapid transit station in Bangrak and Sathon, Bangkok
• Saint Louis Hospital, a private Catholic hospital in Sathon, Bangkok

• Bay St. Louis, Mississippi, city in Hancock County
• East St. Louis, Illinois, city in St. Clair County east of St. Louis, Missouri
• Old Saint Louis, Indiana, unincorporated community
• San Luis Obispo, California (Spanish for "St. Louis, Bishop"), a city in California
• San Luis Obispo County, California, a county in California
• St. Louis, Missouri, independent city
  • Downtown St. Louis, Missouri, central business district of St. Louis, Missouri
  • Greater St. Louis, bi-state metropolitan area
• St. Louis County, Missouri, bordering the city of St. Louis
• Lake St. Louis, Missouri, planned community in St. Charles County
• St. Louis, Michigan, city in Gratiot County
• St. Louis County, Minnesota
• St. Louis Park, Minnesota, city in Hennepin County
• Saint Louis River, river in Minnesota and Wisconsin
• Saint Louis Creek, a stream in Colorado
• St. Louis, Oklahoma, town in Pottawatomie County
• Saint Louis, Oregon, unincorporated community
• Saint Louis, Virginia, unincorporated community

• Louis (died 855), or Ludovicus, one of the 48 Martyrs of Córdoba

• Louis IX of France (1214–1270), King of France
• Louis of Toulouse (1274–1297), French-Neapolitan bishop and noble
• Louis de Montfort (1673–1716), French priest

• Ali St. Louis (1959–2011), Trinidadian sprinter
• Brad St. Louis (born 1976), American football player
• Dexter St. Louis (1968–2019), Trinidadian table tennis player
• Dylan Saint-Louis (born 1995), Congolese footballer
• Fabienne St Louis (born 1988), Mauritian triathlete
• France Saint-Louis (born 1958), Canadian ice hockey player and coach
• François St-Louis, Canadian politician
• Jean-Pierre St-Louis (1951–2020), Canadian cinematographer
• Jeremy St. Louis (born 1971), Canadian journalist
• Jimson St. Louis (born 2002), U.S. Virgin Islands soccer player
• Krysan St. Louis (born 2003), Saint Lucian footballer
• Louis St. Louis (1942–2021), American songwriter
• Lucy St. Louis (born 1992), English actor and singer
• Marie Michele St. Louis (born 1968), Mauritian judoka
• Martin St. Louis (born 1975), Canadian ice hockey player and coach
• Michel-Henri St-Louis, Canadian military officer
• Natasha St. Louis (born 1991), Trinidadian footballer
• Nathaniel St. Louis (born 2000), Canadian soccer player
• Tasha St. Louis (born 1983), Trinidadian footballer
• Terry St. Louis (born 1969), Trinidadian footballer
• Tyree St. Louis (born 1997), American football player

• Ralph St. Louis Pieris Deraniyagala, Sri Lankan politician
• St. Louis Jimmy Oden (1903–1974), American musician

• Saint Louis (1752 ship), a French East Indiaman
• French battleship Saint Louis, a French Navy battleship in commission from 1900 to 1919
• Saint Louis (hotel barge), a hotel barge in southwest France
• Saint-Louis-class cruiser, a class of planned French heavy cruiser, never built
• MS St. Louis, a German ocean liner, notable for a voyage in 1939 when it carried 908 Jewish refugees from Germany
• USS St. Louis, seven United States Navy ships

• St Louis (horse), a racehorse
• Arizona Cardinals, a professional NFL team known as the St. Louis Cardinals from 1960 to 1987
  • See History of the St. Louis Cardinals (NFL) for more details on the team's tenure in St. Louis
• Los Angeles Rams, a professional NFL team known as the St. Louis Rams from 1995 to 2015
  • See History of the St. Louis Rams for more details on the team's tenure in St. Louis
• St. Louis All-Stars, a professional football team during the 1923 NFL season
• Saint Louis Billikens, the intercollegiate athletic program of Saint Louis University
• St. Louis Blues, a professional ice hockey team in the National Hockey League
• St. Louis Browns, a professional baseball team that became the Baltimore Orioles in 1954
• St. Louis Cardinals, a professional baseball team in Major League Baseball
• St. Louis Gunners, a 1934 member of the National Football League that joined the minor AFL in 1939
• St. Louis Stampede, members of the Arena Football League 1995–1996

• Saint Louis FC, American men's team
• AC St. Louis, American men's team
• FC St. Louis, American women's team
• Saint Louis Athletica, American women's team
• SS Saint-Louisienne, Réunion team
• Saint Louis Suns United FC, Seychelles team
• St. Louis City SC, American men's team
  • St. Louis City 2, reserve team

• Lycée Saint-Louis, in Paris, France
• Maryville University of St. Louis, Town and Country, Missouri
• Saint Louis University, St. Louis, Missouri
• Saint-Louis University, Brussels, Brussels, Belgium
• Saint Louis University (Philippines), a private teaching university in Baguio
• St. Louis Christian College, Florissant, Missouri
• St. Louis Community College
• St. Louis College Valenzuela, Valenzuela City, Philippines
• University of Health Sciences and Pharmacy in St. Louis, St. Louis, Missouri
• University of Missouri–St. Louis, St. Louis, Missouri
• University of Saint Louis Tuguegarao, Tuguegarao City, Philippines
• Washington University in St. Louis, St. Louis, Missouri

• Fort St. Louis (disambiguation)
• St. Louis (beer), a Belgian-style beer by Brouwerij Van Honsebrouck
• St. Louis Car Company, a manufacturer of streetcars, trolleybuses and locomotives
• St. Louis Cathedral (disambiguation)
• St. Louis Hotel, in 19th-century New Orleans, Louisiana
• St. Louis Plantation, in Iberville Parish, Louisiana
• Saint Louis (El Greco), a c. 1592–1595 painting
• Saint-Louis (glass manufacturer), a French glass manufacturer
• Order of Saint Louis, a military Order of Chivalry

• San Luis (disambiguation), the Spanish language cognate of the name
• San Luis Obispo, California, a city in the U.S. state of California
• São Luís (disambiguation), the Portuguese language cognate of the name
• The Spirit of St. Louis (disambiguation)
• All pages with titles containing Saint Louis
• All pages with titles containing St. Louis