Gunther XI of Schwarzburg-Blankenburg

Gunther XI of Schwarzburg-Blankenburg (9 September 1331 - 6 June 1368) was a son of Count Henry VII, who died on pilgrimage to Jerusalem in 1338, and Elizabeth of Weimar-Orlamunde. Before June 1347 he married Elizabeth of Hohnstein-Sondershausen.

He ruled half of Arnstadt and, from 1356, Sondershausen, and in June 1367 he held Belitz as a pledge lord. He died in 1368 and was buried in the Liebfrauenkirche at Arnstadt, leaving sons Henry XIV and Gunther XVI.