Eberwin III, Count of Bentheim-Steinfurt (1536 – 19 February 1562 at Bentheim Castle) was a German nobleman. He was a member of the elder line of the House of Bentheim-Steinfurt and was the ruling Count of Bentheim and Steinfurt from 1544 until his death. From 1557, he was also Count of Tecklenburg and Lord of Rheda by marriage.