Fresens is a former municipality in the district of Boudry in the canton of Neuchâtel in Switzerland. On 1 January 2018 the former municipalities of Bevaix, Saint-Aubin-Sauges, Gorgier, Vaumarcus, Montalchez and Fresens merged into the new municipality of La Grande-Béroche.
Fresens is first mentioned in 1265 as Hiremanz dit de Fressen.
Fresens has an area, , of . Of this area, or 83.5% is used for agricultural purposes, while or 7.6% is forested. Of the rest of the land, or 9.5% is settled (buildings or roads).
Of the built up area, housing and buildings made up 5.1% and transportation infrastructure made up 3.8%. Out of the forested land, 5.7% of the total land area is heavily forested and 1.9% is covered with orchards or small clusters of trees. Of the agricultural land, 64.6% is used for growing crops and 13.3% is pastures, while 5.7% is used for orchards or vine crops.
The municipality is located in the Boudry district.
The blazon of the municipal coat of arms is Per fess Gules and Argent, a Rose counterchanged.
Fresens has a population () of . , 2.4% of the population are resident foreign nationals. Over the last 10 years (2000–2010 ) the population has changed at a rate of 10.6%. It has changed at a rate of 2.1% due to migration and at a rate of 7.4% due to births and deaths.
Most of the population () speaks French (206 or 94.5%) as their first language, German is the second most common (8 or 3.7%) and Italian is the third (1 or 0.5%).
the population was 49.8% male and 50.2% female. The population was made up of 105 Swiss men (48.8% of the population) and 2 (0.9%) non-Swiss men. There were 107 Swiss women (49.8%) and 1 (0.5%) non-Swiss women. Of the population in the municipality, 78 or about 35.8% were born in Fresens and lived there in 2000. There were 54 or 24.8% who were born in the same canton, while 62 or 28.4% were born somewhere else in Switzerland, and 15 or 6.9% were born outside of Switzerland.
children and teenagers (0–19 years old) make up 22.9% of the population, while adults (20–64 years old) make up 48.