Sornetan is a village in the municipality of Petit-Val, which is located in the administrative district of the Bernese Jura in the canton of Bern in Switzerland. The former German name Sornethal is no longer used today. Sornetan was a separate municipality until December 31, 2014. 1 January 2015 merged with the municipalities Sornetan Châtelat, Monible and Souboz the new municipality Petit-Val.