Merse may refer to: The Merse (river), in the Italian region of Tuscany The Val di Merse, an area including the valley of the river Merse the Merse (Scotland), a territory located on the boundaries of Scotland and England on the east side; today part of Berwickshire the Merse, an area within Scotland next to Kirkcudbright. A Scottish name for Salt marsh, an environment periodically flooded by sea water Merse (politician), an Inner Mongolian revolutionary of the 1920s and 1930s