Bernard IV, Lord of Lippe

Bernard IV (c. 1230–June 1275) was Lord of Lippe, eldest son of Bernard III and Sophie of Cuijck-Arnsberg. In 1254 he took charge of Rheda and in 1265 succeeded his father in Lippe, while his brother Herman III received Lippstadt.

In 1267 he and his uncle Simon I, bishop of Paderborn, fought the Duchy of Jülich at Zülpich, where Simon was captured; Bernard ransomed him in 1269, saddling his house with debt. He was buried at Marienfeld Abbey, leaving a son, Simon I, by Agnes of Cleves.