The Xalbal River () is a river of Guatemala. Its sources are in the Sierra de los Cuchumatanes mountain range (at ) in the department of El Quiché, where the river is called RÃÂo Xaclbal or RÃÂo Chajul. The Xaclbal river flows northwards down the tropical lowlands of Ixcan where it is called RÃÂo Xalbal (at ), and crosses the border with Mexico, where it joins the Lacantún River, a tributary of the Usumacinta river. The Guatemalan part of Xaclbal river basin covers an area of .
The village of Xalbal, named after the river, suffered a massacre in 1982. The village was abandoned in March 1982.