Alex Jacob (born October 27, 1984) is a former professional poker player and game show contestant.
Jacob is perhaps best known in poker for winning the 2006 main event at the United States Poker Championship, a no-limit Texas hold 'em event televised by ESPN.
He has also appeared at televised final tables at the World Series of Poker and the World Poker Tour.
In 2015, after leaving professional poker, Jacob became a contestant on Jeopardy!, where he won six games and the show's Tournament of Champions.