The County of Wernigerode (German: Grafschaft Wernigerode) was a county of the Holy Roman Empire, located in the Harzgau region of the former Duchy of Saxony, at the northern foot of the Harz mountain range. Its capital was Wernigerode, now in Saxony-Anhalt, Germany. It was ruled by a branch of the House of Stolberg from 1429 until its mediatization to the Kingdom of Prussia in 1806.