The Counts of Mansfeld were a noble family in the region of Mansfeld in present-day Germany. They rose to prominence during the late Middle Ages and played a significant role in the political and military affairs of the Holy Roman Empire. The family is known for its involvement in various conflicts, including the Thirty Years' War. The most notable member of the family was Peter von Mansfeld, who served as a general and was influential in the military campaigns of the time. The Counts of Mansfeld held various titles and lands, contributing to their status and influence in the region until their decline in the 17th century.