Eric I of Saxe-Lauenburg was a German nobleman who ruled as Duke of Saxe-Lauenburg from 1457 until his death in 1472. He was a member of the House of Ascania, a prominent dynasty in medieval Germany. His reign was marked by efforts to strengthen his duchy and maintain its independence amid the political complexities of the time. Eric I was known for his diplomatic skills and alliances, which helped stabilize his territory. He also played a role in the broader political landscape of the Holy Roman Empire, navigating relationships with other noble families and regional powers during his rule.