Vuissens (vɥisɑ̃s; Vouéssens vwɛˈsɛ̃) is a former municipality in the district of Broye, in the canton of Fribourg, Switzerland. On 1 January 2017 the former municipalities of Vuissens, Bussy, Estavayer-le-Lac, Morens, Murist, Rueyres-les-Prés and Vernay merged into the new municipality of Estavayer.
Vuissens had an area, , of . Of this area, or 51.0% is used for agricultural purposes, while or 36.4% is forested. Of the rest of the land, or 12.5% is settled (buildings or roads).
Of the built up area, housing and buildings made up 0.9% and transportation infrastructure made up 2.0%. while parks, green belts and sports fields made up 9.4%. Out of the forested land, all of the forested land area is covered with heavy forests. Of the agricultural land, 44.6% is used for growing crops and 6.1% is pastures.
The blazon of the municipal coat of arms is Gules, a Chevron raguly Or.
Vuissens had a population () of 245. , 10.5% of the population are resident foreign nationals. Over the last 10 years (2000–2010) the population has changed at a rate of 4%. Migration accounted for 5.2%, while births and deaths accounted for 2.3%.
Most of the population () speaks French (159 or 93.0%) as their first language, Albanian is the second most common (6 or 3.5%) and German is the third (4 or 2.3%).
the population was 52.3% male and 47.7% female. The population was made up of 79 Swiss men (45.4% of the population) and 12 (6.9%) non-Swiss men. There were 77 Swiss women (44.3%) and 6 (3.4%) non-Swiss women. Of the population in the municipality, 78 or about 45.6% were born in Vuissens and lived there in 2000. There were 28 or 16.4% who were born in the same canton, while 51 or 29.8% were born somewhere else in Switzerland, and 12 or 7.0% were born outside of Switzerland.
The age distribution, , in Vuissens is; 31 children or 18.1% of the population are between 0 and 9 years old and 19 teenagers or 11.1% are between 10 and 19. Of the adult population, 19 people or 11.1% of the population are between 20 and 29 years old. 25 people or 14.