David Fatum (born August 4, 1968) is a Canadian-American darts player.

Fatum's first major exposure came in the 2008 US Open where he reached the semi-finals losing to Colin Lloyd.

In his third-round game, he defeated Davis Snider who had earlier beaten North American Darts champion Darin Young and former BDO world champion Steve Beaton.

He then secured wins over Bill Davis and Chris Mason before eventually bowing out to Lloyd.

His performance contributed to him finishing 3rd in the American order of merit, earning him a place in the 2009 PDC World Darts Championship.