Saint-Sulpice is a municipality in Switzerland in the canton of Vaud, located in the district of Ouest Lausannois. It is a suburb of the city of Lausanne.
History
Saint-Sulpice is first mentioned in 1228 as Sanctus Surpiscius.
Of the built up area, industrial buildings made up 6.5% of the total area while housing and buildings made up 41.9% and transportation infrastructure made up 11.8%. Power and water infrastructure as well as other special developed areas made up 3.2% of the area while parks, green belts and sports fields made up 12.4%. Out of the forested land, 5.4% of the total land area is heavily forested and 1.6% is covered with orchards or small clusters of trees. Of the agricultural land, 13.4% is used for growing crops and 1.1% is pastures.
The municipality is located along Lake Geneva between the Venoge and Chamberonne river. It consists of the village of Saint-Sulpice, the residential development of Les Pierrettes and the industrial zone of En Champagny.
Coat of arms
The blazon of the municipal coat of arms is Gules, Chief Argent, overall a Church Argent lined Sable.
Demographics
thumb|Police station in Saint-Sulpice
Saint-Sulpice has a population of 5,193 (as of December 2025). 45.7% of the population are foreign nationals. Since the beginning of the new millennium, the population has grown at an average annual rate of 2.34% (2000-2025).
At the 2000 census, most of the population spoke French (2,377 or 81.6%), with German second most common (231 or 7.9%) and English third (81 or 2.8%). There were 58 Italian speakers. Of the population in the municipality 377 or about 12.9% were born in Saint-Sulpice and lived there in 2000. There were 1,015 or 34.8% who were born in the same canton, while 610 or 20.9% were born somewhere else in Switzerland, and 849 or 29.1% were born outside of Switzerland.
The historical population is given in the following chart:
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bar:1402 at:242 fontsize:S text: "58 Hearths" shift:(8,5)
bar:1764 from:start till:135 text:"135"
bar:1850 from:start till:255 text:"255"
bar:1860 from:start till:241 text:"241"
bar:1870 from:start till:289 text:"289"
bar:1880 from:start till:294 text:"294"
bar:1888 from:start till:265 text:"265"
bar:1900 from:start till:295 text:"295"
bar:1910 from:start till:340 text:"340"
bar:1920 from:start till:382 text:"382"
bar:1930 from:start till:591 text:"591"
bar:1941 from:start till:679 text:"679"
bar:1950 from:start till:792 text:"792"
bar:1960 from:start till:1129 text:"1,129"
bar:1970 from:start till:1628 text:"1,628"
bar:1980 from:start till:2129 text:"2,129"
bar:1990 from:start till:2651 text:"2,651"
bar:2000 from:start till:2914 text:"2,914"
bar:2010 from:start till:3218 text:"3,218"
bar:2020 from:start till:4909 text:"4,909"
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Heritage sites of national significance
thumb|Temple of Saint-Sulpice, old church Sainte-Marie-Madeleine, from above
thumb|Swiss Reformed Church of Sainte-Marie-Madeleine ([[Mary Magdalene) and Priory.]]
The Swiss Reformed Church of Sainte-Marie-Madeleine (Mary Magdalene) and Priory is listed as a Swiss heritage site of national significance (see the article about the Church in French).
The roof of the church was reconstructed after an arson on the morning of Thursday 19 July 2001.
Politics
In the 2007 federal election the most popular party was the SVP which received 27.57% of the vote. The next three most popular parties were the FDP (16.05%), the SP (15.08%) and the Green Party (11.75%). In the federal election, a total of 987 votes were cast, and the voter turnout was 52.3%.
Economy
, Saint-Sulpice had an unemployment rate of 3.8%. , there were 2 people employed in the primary economic sector and about 2 businesses involved in this sector. 306 people were employed in the secondary sector and there were 27 businesses in this sector. 894 people were employed in the tertiary sector, with 151 businesses in this sector. There were 1,528 residents of the municipality who were employed in some capacity, of which females made up 42.3% of the workforce.
the total number of full-time equivalent jobs was 1,046. The number of jobs in the primary sector was 1, of which were in agriculture and 1 was in fishing or fisheries. The number of jobs in the secondary sector was 290 of which 81 or (27.9%) were in manufacturing and 178 (61.4%) were in construction. The number of jobs in the tertiary sector was 755. In the tertiary sector; 269 or 35.6% were in wholesale or retail sales or the repair of motor vehicles, 15 or 2.0% were in the movement and storage of goods, 46 or 6.1% were in a hotel or restaurant, 88 or 11.7% were in the information industry, 20 or 2.6% were the insurance or financial industry, 93 or 12.3% were technical professionals or scientists, 12 or 1.6% were in education and 40 or 5.3% were in health care.
, there were 1,163 workers who commuted into the municipality and 1,250 workers who commuted away. The municipality is a net exporter of workers, with about 1.1 workers leaving the municipality for every one entering. About 2.7% of the workforce coming into Saint-Sulpice are coming from outside Switzerland. Of the working population, 15.3% used public transportation to get to work, and 66.8% used a private car. During the school year, the political district provided pre-school care for a total of 803 children of which 502 children (62.5%) received subsidized pre-school care. The canton's primary school program requires students to attend for four years. There were 138 students in the municipal primary school program. The obligatory lower secondary school program lasts for six years and there were 87 students in those schools. There were also 1 students who were home schooled or attended another non-traditional school.
, there were 24 students in Saint-Sulpice who came from another municipality, while 328 residents attended schools outside the municipality. whose sculptures prominently mark many public places in St-Sulpice, including Le Pélican (1976) on the Pelican Park, and
Le Cri du Poète (1972) in the port.