Otto I, Count of Schauenburg and Holstein-Pinneberg

Otto I (c. 1330–1404) was a younger son of Adolf VII and succeeded his brother Adolf VIII as Count of Holstein-Pinneberg and Schauenburg in 1370, after Adolf died on Cyprus. In 1368 he married Mathilde of Brunswick-Lüneburg, widow of Duke Louis I.

In 1377 he acquired Sternberg from the counts of Waldeck. He ruled until his death in 1404 and was succeeded by his son Adolf IX.