Hermenches is a municipality in the district Broye-Vully in the canton of Vaud in Switzerland. Hermenches is first mentioned in 1254 as Ermenges. Hermenches has an area, , of . Of this area, or 65.0% is used for agricultural purposes, while or 28.7% is forested. Of the rest of the land, or 6.3% is settled (buildings or roads). Of the built up area, housing and buildings made up 3.6% and transportation infrastructure made up 2.5%. Out of the forested land, 27.3% of the total land area is heavily forested and 1.5% is covered with orchards or small clusters of trees. Of the agricultural land, 44.2% is used for growing crops and 20.1% is pastures. The municipality was part of the Moudon District until it was dissolved on 31 August 2006, and Hermenches became part of the new district of Broye-Vully. It consists of a number of scattered hamlets. The blazon of the municipal coat of arms is Per bend Gules and Vert, overall on a Garb Or a Dove sejant Argent. Hermenches has a population () of . , 8.7% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 24.3%. It has changed at a rate of 16.8% due to migration and at a rate of 6.4% due to births and deaths. Most of the population () speaks French (271 or 95.4%), with German being second most common (6 or 2.1%) and Italian being third (2 or 0.7%). Of the population in the municipality 99 or about 34.9% were born in Hermenches and lived there in 2000. There were 98 or 34.5% who were born in the same canton, while 40 or 14.1% were born somewhere else in Switzerland, and 31 or 10.9% were born outside of Switzerland. In there were 9 live births to Swiss citizens and were 4 deaths of Swiss citizens. Ignoring immigration and emigration, the population of Swiss citizens increased by 5 while the foreign population remained the same. There was 1 Swiss man who emigrated from Switzerland. At the same time, there was 1 non-Swiss man who immigrated from another country to Switzerland.