Saint-Hyacinthe (; French: ) is a city in southwestern Quebec east of Montreal on the Yamaska River. The population as of the 2021 Canadian census was 57,239. The city is located in Les Maskoutains Regional County Municipality of the Montérégie region, and is traversed by the Yamaska River. Quebec Autoroute 20 runs perpendicular to the river. Saint-Hyacinthe is the seat of the judicial district of the same name. History Jacques-Hyacinthe Simon dit Delorme, owner of the seigneurie, started its settlement in 1757. He gave his patron saint name (Saint Hyacinth the Confessor of Poland) to the seigneurie, which was made a city in 1850. St. Hyacinth's Cathedral is the seat of the Roman Catholic Diocese of Saint-Hyacinthe. It was erected in 1852. 2001 merger As part of the 2000–06 municipal reorganization in Quebec, on 27 December 2001, the city of Saint-Hyacinthe amalgamated with five neighbouring towns (listed here with their populations as of 2001): Saint-Hyacinthe (39,739) Sainte-Rosalie (4,170) Saint-Thomas-d'Aquin (4,000) Sainte-Rosalie Parish (1,476) Saint-Hyacinthe-le-Confesseur, Quebec (1,151) Notre-Dame-de-Saint-Hyacinthe, Quebec (858) Demographics In the 2021 Canadian census conducted by Statistics Canada, Saint-Hyacinthe had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of , it had a population density of in 2021. In 2021, 9.8% of Saint-Hyacinthe residents were visible minorities, 1.3% were Indigenous, and the remaining 88.9% were white/European. The largest visible minority groups were Black (4.4%), Latin American (3.1%) and Arab (1.4%). 71.8% of residents were Christian, down from 88.8% in 2011. 63.2% were Catholic, 5.6% were Christian n.o.s, 1.6% were Protestant, and 1.3% were other Christian denominations or Christian-related traditions. Non-religious or secular people were 25.0% of the population, up from 9.9% in 2011. The only named non-Christian religions with adherents in Saint-Hyacinthe were Islam (2.6%) and Buddhism (0.2%). Other religions and spiritual traditions accounted for just 0.3% of the population. In 2021, French was the mother tongue of 90.9% of residents. Other common first languages were Spanish (3.1%), Arabic (0.9%) and English (0.9%). 0.7% listed both French and a non-official language as mother tongues, while 0.6% listed both French and English. Economy Agriculture and its related derivates are at the heart of Saint-Hyacinthe's economic infrastructure. The city has been nicknamed the "Agricultural technopolis of Canada", because it is home to several research institutions in the field such as the centre de recherche sur les