Born in rural poverty, then raised by a mother on welfare in a poor urban neighborhood, Winfrey became a millionaire at age 32 when her talk show went national. Winfrey was in a position to negotiate ownership of the show and start her own production company because of the success and the amount of revenue the show generated. At age 41, Winfrey had a net worth of $340 million and replaced Bill Cosby as the only African American on the Forbes 400.

Net Worth: $2.7 billion

Oprah Winfrey with President Obama

Although black people are just under 13% of the U.S. population, Winfrey has remained the only African American to rank among America’s 400 richest people nearly every year since 1995. With a 2000 net worth of $800 million, Winfrey is believed to be the richest African American of the 20th century. Due to her status as a historical figure, Professor Juliet E.K. Walker of the University of Illinois created the course “History 298: Oprah Winfrey, the Tycoon.” Winfrey was the highest paid TV entertainer in the United States in 2006, earning an estimated $260 million during the year, five times the sum earned by second-place music executive Simon Cowell. By 2008, her yearly income had increased to $275 million.

Forbes’ international rich list has listed Winfrey as the world’s only black billionaire from 2004 to 2006 and as the first black woman billionaire in world history. According to Forbes, in September 2010 Winfrey was worth over $2.7 billion and has overtaken former eBay CEO Meg Whitman as the richest self-made woman in America.