Friesenhagen is a municipality in the north of the district of Altenkirchen, in Rhineland-Palatinate, in Western Germany.

With an area of 51.3 square kilometres (19.8 sq mi), it is also the largest community in the district of Altenkirchen.

Friesenhagen was first mentioned in a papal document issued by Pope Innocence II in the year 1311.

The altar of its St. Sebastian's church is attributed to the first half of the 13th Century.In the late medieval period, marked by the 30-year war (1618 to 1648) and for more than half a century, Friesenhagen was the location of infamous witch-hunts.

The executions of supposed witches took place on "Blumenberg", a hill overlooking the village of Friesenhagen.