The Grenzchopf () is a mountain of the Appenzell Alps, overlooking the Schwägalp Pass on the border between the Swiss cantons of Appenzell Ausserrhoden and St. Gallen.
Located west of the Säntis, the Grenzchopf is one of the highest summits of the canton of Appenzell Ausserrhoden. It is also its southernmost point of this canton.