Longueuil is a city in the province of Quebec , Canada . It is the seat of the Montérégie administrative region and the central city of the Urban agglomeration of Longueuil . It sits on the south shore of the Saint Lawrence River directly across from Montreal . The population as of the Canada 2011 Census totaled 231,409 , making it Montreal 's second largest suburb , the fifth most populous city in Quebec and nineteenth largest in Canada . Charles Le Moyne founded Longueuil as a seigneurie in 1657 . It would become a parish in 1845 , a village in 1848 , a town in 1874 and a city in 1920 . Between 1961 and 2002 , Longueuil 's borders grew three times , as it was amalgamated with surrounding municipalities ; there was a partial de-amalgamation in 2006 -LRB- see 2000 -- 2006 municipal reorganization in Quebec -RRB- . Longueuil is a residential , commercial and industrial city . It incorporates some urban features , but is essentially a suburb . Longueuil can be classified as a commuter town as a large portion of its residents commute to work in Montreal . Most buildings are single-family homes constructed in the post-war period . The city consists of three boroughs : Le Vieux-Longueuil , Saint-Hubert and Greenfield Park . Longueuil is the seat of the judicial district of Longueuil . Residents of the city are called Longueuillois . The territory of New France was divided into seigneuries in order to ensure the colony 's defence . Longueuil was founded in 1657 by Charles Le Moyne , a merchant from Ville-Marie -LRB- present day Montreal -RRB- , as a seigneurie . According to Abbé Faillon , Charles Le Moyne , lord of the area starting in 1657 , named Longueuil after a village which is today the seat of a canton in the district of Dieppe in his homeland of Normandy . In France , the name is spelled `` Longueil '' and it is rumored that it was a mistake to spell it `` Longueuil '' . His son , Charles Le Moyne de Longueuil , built Fort Longueuil as his fortified residence . It was constructed of stone between 1685 and 1690 and had four towers . Fort Longueuil was believed to be occupied by American troops during the American Revolutionary War . It was subsequently occupied by the British . It was demolished in 1810 due to its poor condition . The archaeological remains of Fort Longueuil were recognized as a National Historic Site of Canada on May 25 , 1923 . The site extends beneath the present-day Saint-Antoine-de-Padoue Cathedral . The seigneurial system ended in 1845 and Longueuil was turned into a parish municipality named Saint-Antoine-de-Longueuil . In 1848 , a portion detached from the parish and officially established as the village of Longueuil . This same village became a town in 1874 , and then a city in 1920 . Musician Paul Pratt notably served as the city 's mayor from 1935-1966 . Longueuil 's city limits expanded for the first time in 1961 when it merged with Montréal-Sud , and again in 1969 when it merged with Ville Jacques-Cartier . In both cases , Longueuil was chosen as the name of the new city . On January 1 , 2002 , as part of the 2000 -- 2006 municipal reorganization in Quebec , the provincial government amalgamated the former Longueuil with Boucherville , Brossard , Greenfield Park , LeMoyne , Saint-Bruno-de-Montarville , Saint-Hubert and Saint-Lambert . As with the 1960s , the name Longueuil was chosen for the new city . However , after a change of government and a 2004 referendum , Boucherville , Brossard , Saint-Lambert and Saint-Bruno-de-Montarville were re-constituted as independent cities on January 1 , 2006 . As such , the current city of Longueuil now includes only the former cities of Longueuil -LRB- 1969-2002 -RRB- , Saint-Hubert , Greenfield Park and LeMoyne . Longueuil occupies 115.59 square kilometres -LRB- 44.6 sq mi -RRB- of land . The city is bordered by the cities of Saint-Lambert and Brossard to the west , Boucherville to the east , Saint-Bruno-de-Montarville to the south and the Saint Lawrence River and Montreal to the north . The city of Longueuil is located approximately 7 kilometres -LRB- 5 mi -RRB- south of Montreal on the south shore of the Saint Lawrence River . Longueuil is located in the Saint Lawrence River valley , and is a vast plain . Areas near the river were originally swamp land with mixed forest , and later prime agricultural land . Agricultural land still exists in the portions of the city furthest from the river . The city of Longueuil also includes Île Charron , a small island in the Saint Lawrence River , and part of the Boucherville Islands . Like Montreal , Longueuil is classified as humid continental or hemiboreal -LRB- Köppen climate classification Dfb -RRB- . Longueuil has long winters , lasting from November to March , short springs during April and May , average summers , lasting from June to August , and short autumns during September and October . According to the 2011 Canadian Census , the city of Longueuil had 231,409 people , an increase of 0.9 % over 2006 's figure of 229,330 . Longueuil occupies 115.59 square kilometres of space , giving the city a population density of 2,002 persons per kilometre squared . There were 106,499 private dwellings , 102,067 of which were occupied by usual residents . Of the 132,570 workers in Longueuil , the median income was $ 26,537 , which is above Quebec 's provincial average of $ 25,464 . Among the 69,990 full-time workers , the median income was $ 37,521 or slightly below the provincial average . As of the 2011 Canadian Census , French was the mother tongue language of 81.4 % of Longueuil 's residents while English was the first language of 7.5 % . Other languages were spoken by 13.6 % of the population , with the most spoken being Spanish -LRB- 3.0 % -RRB- , Arabic -LRB- 2.1 % -RRB- , Haitian Creole -LRB- 1.2 % -RRB- , Romanian -LRB- 0.7 % -RRB- , Persian -LRB- 0.7 % -RRB- , Chinese -LRB- 0.6 % -RRB- , Italian -LRB- 0.6 % -RRB- and Portuguese -LRB- 0.6 % -RRB- . These figures include multiple responses . People of European origins made up 87.6 % of the population in 2006 . The largest visible minority groups are Black -LRB- 4.1 % -RRB- , Latin American -LRB- 2 % -RRB- , Arab -LRB- 1.6 % -RRB- , Chinese -LRB- 1.2 % -RRB- , Southeast Asian -LRB- 1 % -RRB- , and South Asian -LRB- 0.7 % -RRB- . Although a large chunk of Longueuil 's work force commute to Montreal , the city nevertheless offers many jobs in a diverse range of industries . Above all , Longueuil benefits from having very low property value despite its close proximity to Montreal . Longueuil is particularly strong in the aerospace industry . It is home to the headquarters of both Pratt & Whitney Canada and Héroux-Devtek . Pratt & Whitney Canada is Longueuil 's top employer with 5,000 employees , while Héroux-Devtek has 550 employees . Also located in Longueuil is the headquarters of the Canadian Space Agency -LRB- John H. Chapman Space Center -RRB- , adjacent to Montréal / Saint-Hubert Airport . Pascan Aviation has its headquarters in Saint-Hubert , Longueuil . Other companies based in Longueuil include Agropur and Jean Coutu Group . In 2008 , Canadian Business ranked Longueuil as the 30th best place to do business in Canada . There are several notable cultural events in Longueuil each year . The Longueuil International Percussion Festival , which features 500 musicians , takes place over six days in July in the neighbourhood of Old Longueuil , and draws 200,000 visitors per year . There are three nature parks in Longueuil , Parc Marie-Victorin and Parc Michel-Chartrand in Le Vieux-Longueuil and Parc de la Cité in Saint-Hubert . There are seven arenas : Cynthia Coull Arena in Greenfield Park ; Aréna Émile-Butch-Bouchard , Aréna Jacques-Cartier , Aréna Olympia and Colisée Jean Béliveau in Le Vieux-Longueuil ; and Centre sportif Gaétan-Boucher and Centre sportif Rosanne-Laflamme in Saint-Hubert . Notable places of worship include the Roman Catholic Co-Cathedral of Saint-Antoine-de-Padoue and , and the Montréal Québec Temple of the The Church of Jesus Christ of Latter-day Saints . The current mayor is Caroline St-Hilaire , a former member of the Canadian House of Commons . She has held the title since 2009 . She is the third mayor of Longueuil since the 2002 merger . Businessman Jacques Olivier who once served as Minister of Labour served as mayor from 2002 until 2005 . The second mayor of Longueuil was Claude Gladu , serving from 2006 to 2009 . He also happened to be mayor of the former city of Longueuil from 1994 to 2002 . The city 's three boroughs are Le Vieux-Longueuil , Greenfield Park and Saint-Hubert . In total there are 26 city councillors , including one borough president each . Greenfield Park has three concillors and its borough president is Mireille Carrière of Action Longueuil . Saint-Hubert has eight councillors and its borough president is Lorraine Guay-Boivin of Action Longueuil . Le Vieux-Longueuil has fifteen councillors and its borough president is Michel Desjardins of the Parti municipal de Longueuil . Longueuil 's city hall is located in the borough of Saint-Hubert . Federally , Longueuil is part of three electoral districts , all of which are represented by the New Democratic Party -LRB- NDP -RRB- . The riding of Saint-Lambert , which includes the boroughs of Le Vieux-Longueuil and Greenfield Park as well as the city of Saint-Lambert is represented by Sadia Groguhé . The riding of Longueuil -- Pierre-Boucher , which includes the eastern portion of the borough of Le Vieux-Longueuil as well as the city of Boucherville is represented by Pierre Nantel . The riding of Saint-Bruno -- Saint-Hubert , which includes the borough of Saint-Hubert as well as the city of Saint-Bruno-de-Montarville is represented by Djaouida Sellah . Provincially , Longueuil is represented in four electoral districts . The electoral district of Laporte includes the boroughs of Greenfield Park and Saint-Hubert , and is represented by Nicole Ménard of the Quebec Liberal Party . The electoral district of Marie-Victorin , which includes the western portion of Le Vieux-Longueuil , is represented by Bernard Drainville of the Parti Québécois -LRB- PQ -RRB- . The electoral district of Taillon , which covers the eastern portion of Le Vieux-Longueuil is represented by Marie Malavoy of the PQ . The electoral district of Vachon , which covers the borough of Saint-Hubert , is represented by Martine Ouellet of the PQ . According to the 2006 Census , about 39,485 city residents -LRB- 17.2 % of the total population -RRB- commute to work in Montreal on a daily basis , while only 38,090 residents -LRB- 16.6 % -RRB- work in the city itself . A further 6,915 residents -LRB- 3.0 % -RRB- work in Boucherville every day , 4,775 -LRB- 2.1 % -RRB- work in Brossard , 2,795 -LRB- 1.2 % -RRB- in Saint-Bruno-de-Montarville , and 1,815 -LRB- 0.8 % -RRB- work in Saint-Lambert , the four other constituent cities of the Longueuil agglomeration . By contrast only 8,845 people commute from Montreal to work in Longueuil every day , while 4,080 people commute from Brossard to work in Longueuil , 2,940 people commute from Boucherville , 2,090 from Sainte-Julie , 1,825 from Saint-Bruno-de-Montarville , 1,815 from Chambly , and 1,810 from Saint-Jean-sur-Richelieu . The Saint Lawrence River between the Island of Montreal and the south shore is traversed by only five automobile crossings . Two of these are in Longueuil , the Louis Hippolyte Lafontaine Tunnel -LRB- part of Autoroute 25 -RRB- and the Jacques Cartier Bridge -LRB- part of Route 134 -RRB- . Autoroute 20 is an important highway in Longueuil , bordering the Saint Lawrence River in the Le Vieux-Longueuil borough , where it co-exists with Route 132 , and finally heading eastward toward Boucherville . Autoroute 30 crosses the Saint-Hubert borough in the southern part of the city , between the cities of Brossard and Saint-Bruno-de-Montarville . Route 116 is another major highway , with its western terminus located in LeMoyne , heading east through the borough of Saint-Hubert toward Saint-Bruno-de-Montarville . Route 112 co-exists with Route 116 from LeMoyne to Cousineau Boulevard in Saint-Hubert , where it heads southeast toward Carignan . Route 134 is a major artery , perhaps better known by its more common names : the Jacques Cartier Bridge on the portion crossing the Saint-Lawrence River , and Taschereau Boulevard which connects the bridge to all three boroughs of Longueuil , and southward toward the city of Brossard . The Réseau de transport de Longueuil -LRB- RTL -RRB- provides bus service in Longueuil . There are 77 bus routes and 12 shared taxi routes serving 139,374 passengers per day , and 32,738,155 passengers in 2011 . Almost all bus lines of the RTL terminate at the Longueuil Bus Terminus . Many buses terminating at the other main bus terminus , Brossard-Panama , cross the Champlain Bridge to arrive at the Terminus Centre-Ville -LRB- AMT -RRB- in downtown Montreal -LRB- under the 1000 de la Gauchetière office tower , at Bonaventure metro -RRB- . The city is also served by the Longueuil -- Université-de-Sherbrooke metro station , adjacent to the Longueuil bus terminus . The station connects to downtown Montreal via the yellow line of the metro . The Agence métropolitaine de transport -LRB- AMT -RRB- runs the Mont-Saint-Hilaire commuter train line also serves the south shore . The only commuter train station in the city of Longueuil is Saint-Hubert Station . Until the mid-1950s , Longueuil was served by interurban streetcars operated by the Montreal and Southern Counties Railway . Longueuil also has a small airport , Saint-Hubert Airport . It is one of Canada 's most important general aviation airports , ranked 12th busiest airport by aircraft movements . A small marina , the Réal-Bouvier Marina is located on the Saint Lawrence River in the borough of Le Vieux-Longueuil . The Old Port of Montreal -- Longueuil Ferry is a seasonal ferry service links the Réal-Bouvier Marina to the Jacques Cartier Pier in the Old Port of Montreal . The city is served by two hospitals . The Charles-LeMoyne Hospital is a Université de Sherbrooke affiliated hospital in the borough of Greenfield Park . It is the main hospital for Longueuil , as well as the neighbouring cities of Saint-Lambert and Brossard . The Pierre-Boucher Hospital is a smaller hospital in the borough of Le Vieux-Longueuil which serves Le Vieux-Longueuil , Boucherville , Varennes , Sainte-Julie , Saint-Amable , Verchères , Calixa-Lavallée and Contrecœur . The city of Longueuil is served by several educational institutions . Both the Université de Sherbrooke and Université de Montréal maintain campuses in the Borough of Le Vieux-Longueuil . There is one CEGEP in Longueuil , Collège Édouard-Montpetit , located in Le Vieux-Longueuil . Collège Édouard-Montpetit has an aerotechnic school , École nationale d'aérotechnique located at a separate campus in the borough of Saint-Hubert near Saint-Hubert Airport . There are two technical and professional colleges , both located in Le Vieux-Longueuil : these are the Pierre-Dupuy Professional Formation Centre and Collège Info-Technique . Public anglophone schools are operated by the Riverside School Board . There are two secondary schools in Longueuil operated by the Riverside School Board : Centennial Regional High School in Greenfield Park and Heritage Regional High School in Saint-Hubert . Public francophone schools are operated by the Commission scolaire Marie-Victorin . There are seven secondary schools in Longueuil operated by the Commission scolaire Marie-Victorin . École secondaire Internationale St-Edmond and École secondaire Participative l'Agora are in Greenfield Park . École secondaire André-Laurendeau and École secondaire Mgr-A.M.-Parent are in Saint-Hubert . École secondaire Gérard-Filion , École secondaire Jacques-Rousseau and École secondaire St-Jean-Baptiste are in Le Vieux-Longueuil . There are also three private francophone secondary schools , all of which are in Le Vieux-Longueuil . They are Collège Charles-Lemoyne , Collège Français and Collège Notre-Dame-de-Lourdes . Longueuil and the other cities in the agglomeration are served by two free of charge weekly French-language newspapers . Le Courrier du Sud , published by Quebecor Media , is the oldest , and contains inserts tailored to specific boroughs -LRB- `` Le Journal de Saint-Hubert '' for Saint-Hubert and `` Le Magazine '' for Greenfield Park , LeMoyne and the city of Saint-Lambert -RRB- . Rive-Sud Express is a newer weekly , published by Transcontinental Media . Both `` Le Courrier du Sud '' and `` Rive-Sud Express '' are both home delivered as well as carried in newspaper boxes . Point Sud is an independent monthly newspaper , also free of charge , that is carried on newspaper stands in select locations . Longueuil is also served by the CHAA-FM 103.3 radio station . Another radio station , CHMP-FM 98.5 is officially licensed to Longueuil , despite both the studio and transmitter being located in Montreal . Residents of Longueuil and adjacent communities are also served by a local cable television station , Télé Rive-Sud -LRB- TVRS -RRB- which is owned by Quebecor Media and is an affiliate of Canal Vox . It is available to Videotron cable subscribers only .