Romairon is a former municipality in the district of Jura-Nord Vaudois in the canton of Vaud in Switzerland. The municipalities of Fontanezier, Romairon, Vaugondry and Villars-Burquin merged on 1 July 2011 into the new municipality of Tévenon. History Romairon is first mentioned in 1403 as Romeyron. Geography Romairon has an area, , of . Of this area, or 39.7% is used for agricultural purposes, while or 57.1% is forested. Of the rest of the land, or 1.4% is settled (buildings or roads) and or 0.2% is unproductive land. Of the built up area, housing and buildings made up 0.6% and transportation infrastructure made up 0.6%. Out of the forested land, 50.3% of the total land area is heavily forested and 6.7% is covered with orchards or small clusters of trees. Of the agricultural land, 4.3% is used for growing crops and 7.0% is pastures and 28.2% is used for alpine pastures. The municipality was part of the Grandson District until it was dissolved on 31 August 2006, and Romairon became part of the new district of Jura-Nord Vaudois. The municipality is located in mountains between Chasseron and Mont Aubert, on the border with the Val-de-Travers. Coat of arms The blazon of the municipal coat of arms is Or, on a Bend Vert a May-beetle proper bendwise. Demographics Romairon has a population () of 37. , 4.9% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of -15.9%. It has changed at a rate of -9.1% due to migration and at a rate of -6.8% due to births and deaths. All of the population () speaks French. Of the population in the municipality 20 or about 54.1% were born in Romairon and lived there in 2000. There were 12 or 32.4% who were born in the same canton, while 3 or 8.1% were born somewhere else in Switzerland, and 2 or 5.4% were born outside of Switzerland. In there were 0 live births to Swiss citizens and 1 death of a Swiss citizen. Ignoring immigration and emigration, the population of Swiss citizens decreased by 1 while the foreign population remained the same. There was 1 Swiss woman who immigrated back to Switzerland. The total Swiss population remained the same in 2008 and the non-Swiss population remained the same. This represents a population growth rate of 0.0%. The age distribution,