Henry I, Count of Holstein-Rendsburg

Henry I (1258–1304) was the first Count of Holstein-Rendsburg and a son of Gerhard I of Holstein-Itzehoe. In 1285 he persuaded King Eric V of Denmark to release Duke Valdemar IV of Schleswig from captivity. After Gerhard died in 1290, the surviving sons partitioned Holstein-Itzehoe and Henry received the Rendsburg portion.

He waged repeated wars against the Ditmarschen and, shortly before he died on 5 August 1304, introduced a toll on imported goods; Hamburg received half the proceeds.