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Oprah Winfrey (born Orpah Gail Winfrey; January 29, 1954) is an American media proprietor, talk show host, actress, producer, and philanthropist. Winfrey is best known for her self-titled, multi-award-winning talk show "The Oprah Winfrey Show" which was the highest-rated program of its kind in history and was nationally syndicated from 1986 to 2011. She has been ranked the richest African-American of the 20th century, the greatest black philanthropist in American history, and was for a time the world's only black billionaire. She is also, according to some assessments, the most influential woman in the world.

Winfrey was born into poverty in rural Mississippi to a teenage single mother and later raised in an inner-city Milwaukee neighborhood. She experienced considerable hardship during her childhood, saying she was raped at age nine and became pregnant at 14; her son died in infancy. Sent to live with the man she calls her father, a barber in Tennessee, Winfrey landed a job in radio while still in high school and began co-anchoring the local evening news at the age of 19. Her emotional ad-lib delivery eventually got her transferred to the daytime-talk-show arena, and after boosting a third-rated local Chicago talk show to first place, she launched her own production company and became internationally syndicated.

Credited with creating a more intimate confessional form of media communication, she is thought to have popularized and revolutionized the tabloid talk show genre pioneered by Phil Donahue, which a Yale study says broke 20th-century taboos and allowed LGBT people to enter the mainstream. By the mid-1990s, she had reinvented her show with a focus on literature, self-improvement, and spirituality. Though criticized for unleashing confession culture, promoting controversial self-help ideas and an emotion-centered approach she is often praised for overcoming adversity to become a benefactor to others. From 2006 to 2008, her support of Barack Obama, by one estimate, delivered over a million votes in the close 2008 Democratic primary race.