Tor Helness (born 25 July 1957 or 1958) is a Norwegian professional bridge player. He was a stalwart on Norway junior and open teams for thirty years before moving to Monaco. Through 2012 he has won four world championships in teams-of-four competition. As of June 2013 he ranks tenth among Open World Grand Masters and his regular partner Geir Helgemo ranks ninth.
From 1979 to 1981, Helness represented Norway on both its junior and open teams. In 1980 the juniors were European champions (there was yet no world championship) and the open team reached the World Team Olympiad semifinal. For 25 years the open team regularly reached European semifinals, and it won world silver medals in 1993 and 2001. Norway finally won the world team championship in 2007, the biennial Bermuda Bowl, with a team of six including Helness-Helgemo as anchor pair.
The couple Tor and Gunn Helness won the Mixed Pairs (an event without a world championship) at the 2005 European Open Championships. At the inaugural, 2008 World Mind Sports Games in Beijing, Tor Helness won the Open Individual gold medal and Geir Helgemo won the silver! Norway's open team won the bronze.
From 2011 Helness and his regular Norwegian partner Geir Helgemo are full-time members of a team led and paid by the Swiss real estate tycoon Pierre Zimmermann, under contract expiring 2016. The team finished third in the 2010 world championship, not yet full-time, and it will compete in the European Bridge League open championship this spring. From 2012 all six members will be subjects of the Prince of Monaco and the team will be a prohibitive favorite to represent Monaco internationally in bridge events.