The Keeping Up With The Kardashians beauty pulled in a massive £4 million in the last 12 months, thanks to her reality series, lucrative endorsement deals and various promotional appearances.
The 30-year-old star is said to make as much as £50,000 for a single appearance.
Lauren Conrad came second in the ranking - she boosted her bank balance by £3.3 million in 2010, despite leaving the cast of The Hills last year. Conrad has made her fortune with a best-selling fashion range and a trilogy of young adult books.
Conrad's former co-star Audrina Patridge was also namechecked after earning £2.3 million thanks to a deal with hamburger chain Carl's Jr., tying for fourth place with TV personality Kate Gosselin.
The Real Housewives of New York's Bethenny Frankel came third on the list compiled by the Daily Beast.