Eric I, Duke of Saxe-Lauenburg

Eric I of Saxe-Lauenburg (c.1280–1360) was a member of the House of Ascania who ruled as one of the dukes of Saxony from 1282 until 1338.

The last document, mentioning the brothers and their uncle Albert II as Saxon fellow dukes dates back to 1295.

Eric I and his brothers at first jointly ruled Saxe-Lauenburg, before they partitioned it into three parts, while the exclave Land of Hadeln remained a trilateral condominium.

Eric then held Bergedorf (Vierlande) and Lauenburg and inherited the share of his childless brother Albert III, Saxe-Ratzeburg, after he already deceased in 1308 and a retained section from Albert's widow Margaret of Brandenburg-Salzwedel on her death.

In the course of a feud between Eric II and the neighbouring Duke William of Brunswick and Lunenburg (Celle) the latter's troops expelled Eric I from his castle Riepenburg in Kirchwerder (today's Borough of Bergedorf, Hamburg) and he perished in exile at his granddaughter Jutta in Hoya's capital Nienburg upon Weser.