Because Wernigerode was heavily damaged by the Thirty Years' War, the Counts of Stolberg-Wernigerode also resided in the castle of Ilsenburg.

The town of Gedern in Hesse, acquired in 1535, became the seat of the cadet branch of Stolberg-Gedern in 1677.

This junior line, raised to an imperial principality by Emperor Charles VII of Wittelsbach in 1742, was reacquired by Stolberg-Wernigerode in 1804.

In the 1815 Congress of Vienna, Stolberg-Wernigerode was granted to Prussia, although successive counts retained sovereign rights until 1876.

Other members of this line bore the equal title of Graf/Gräfin zu Stolberg-Wernigerode (not to be confused with ordinary Counts) and were styled as Illustrious Highness.