Christopher Philip Ferguson (born on April 11, 1963, in Los Angeles, California) is an American professional poker player. In his career he has won five World Series of Poker bracelets, including the bracelet for the 2000 WSOP Main Event, and was the winner of the 2008 NBC National Heads-Up Poker Championship.

Ferguson attended UCLA where he earned a Ph.D. in computer science (focusing on virtual network algorithms) in 1999 after five years as an undergraduate and 13 years as a graduate student. His Ph.D. advisor was Leonard Kleinrock. Ferguson's parents have doctoral degrees in mathematics and his father, Thomas Ferguson, teaches game theory and theoretical probability at UCLA. His style is highly mathematical, using a strong knowledge of game theory and developing computer simulations to improve his understanding of the game.

Ferguson was playing poker before age 10. In college he honed his skill on IRC playing poker for play money in chat rooms. In 1994, he began playing in tournaments in California and in 1995, he entered his first World Series of Poker. Ferguson beat T. J. Cloutier at the main event of the 2000 WSOP to win the $1.5 million prize. In 2004, Ferguson helped launch the online poker site Full Tilt Poker. Ferguson finished runner-up to Phil Hellmuth in the 2005 National Heads-Up Poker Championship. He made the finals again in 2006, but again finished second, this time to Ted Forrest. In 2008 he made the finals for the third time, this time defeating Andy Bloch and winning the title. He has the most wins in the four-year period of the tournament, with an overall match record of 16-3