The 59-year-old talk show legend, who has been dating Stedman Graham for nearly three decades, said they have no plans to walk down the aisle, reported Contactmusic.
Asked if she will leave earth as a never-married woman, Winfrey said, "Yes. Yeah, I think that's my final answer."
However, 'The Butler' star admits she recently pondered marriage after attending her friend Tina Turner's wedding to Erwin Bach in Switzerland in July.
"I think that it's interesting that you would ask it because I thought about it again at Tina Turner's wedding. Tina was like, 'Oprah, you need to do this. You need to do it.' And I was just thinking, 'Well, OK, would things really be different?' And no, I don't think so.