Seigneux is a former municipality in the district of Broye-Vully in the canton of Vaud in Switzerland. The villages of Cerniaz, Combremont-le-Grand, Combremont-le-Petit, Granges-près-Marnand, Marnand, Sassel, Seigneux and Villars-Bramard merged on 1 July 2011 into the new municipality of Valbroye. Seigneux is first mentioned around 1216-50 as Simuus. Seigneux has an area, , of . Of this area, or 60.2% is used for agricultural purposes, while or 31.8% is forested. Of the rest of the land, or 7.0% is settled (buildings or roads). Of the built up area, housing and buildings made up 2.4% and transportation infrastructure made up 3.2%. Out of the forested land, 29.1% of the total land area is heavily forested and 2.7% is covered with orchards or small clusters of trees. Of the agricultural land, 43.0% is used for growing crops and 15.8% is pastures, while 1.3% is used for orchards or vine crops. The municipality was part of the Payerne District until it was dissolved on 31 August 2006, and Seigneux became part of the new district of Broye-Vully. The blazon of the municipal coat of arms is Per fess Or and Azure, a ciborium counterchanged, bordered Gules and Argent. Seigneux has a population () of 296. , 8.7% of the population are resident foreign nationals. Over the last 10 years (1999-2009 ) the population has changed at a rate of 2.8%. It has changed at a rate of -2.8% due to migration and at a rate of 5.2% due to births and deaths. Most of the population () speaks French (260 or 94.2%), with Portuguese being second most common (6 or 2.2%) and German being third (5 or 1.8%). There are 3 people who speak Italian. Of the population in the village 91 or about 33.0% were born in Seigneux and lived there in 2000. There were 106 or 38.4% who were born in the same canton, while 47 or 17.0% were born somewhere else in Switzerland, and 27 or 9.8% were born outside of Switzerland. In there were 4 live births to Swiss citizens and were 3 deaths of Swiss citizens. Ignoring immigration and emigration, the population of Swiss citizens increased by 1 while the foreign population remained the same.