Damphreux (dɑ̃fʁø) is a former municipality in the district of Porrentruy in the canton of Jura in Switzerland. Damphreux is first mentioned in 1161 as Damfriol. On 1 January 2023, Damphreux and Lugnez were merged to form the new municipality of Damphreux-Lugnez. Damphreux has an area of . Of this area, or 62.4% is used for agricultural purposes, while or 31.4% is forested. Of the rest of the land, or 5.1% is settled (buildings or roads), or 0.5% is either rivers or lakes and or 0.5% is unproductive land. Of the built up area, housing and buildings made up 2.3% and transportation infrastructure made up 2.3%. Out of the forested land, all of the forested land area is covered with heavy forests. Of the agricultural land, 38.7% is used for growing crops and 23.3% is pastures. Of the water in the municipality, 0.4% is in lakes and 0.2% is in rivers and streams. The municipality is located in the Porrentruy district. The blazon of the municipal coat of arms is Argent, a Squirrel Gules holding an Acorn Vert sitting on a Mount of the last. Damphreux has a population () of . , 7.2% of the population are resident foreign nationals. Over the last 10 years (2000–2010) the population has changed at a rate of -1.7%. Migration accounted for -4.7%, while births and deaths accounted for 2.3%. Most of the population () speaks French (144 or 86.7%) as their first language, German is the second most common (19 or 11.4%) and Italian is the third (1 or 0.6%). the population was 53.3% male and 46.7% female. The population was made up of 83 Swiss men (49.1% of the population) and 7 (4.1%) non-Swiss men. There were 74 Swiss women (43.8%) and 5 (3.0%) non-Swiss women. Of the population in the municipality, 71 or about 42.8% were born in Damphreux and lived there in 2000. There were 54 or 32.5% who were born in the same canton, while 24 or 14.5% were born somewhere else in Switzerland, and 17 or 10.2% were born outside of Switzerland. children and teenagers (0–19 years old) make up 25.