2008 in sports describes the year's events in world sport.

American football

Archery

Association football

Australian rules football

Baseball

Basketball

Bowls

Boxing

Canadian football

Cycling

Road Cycling

Grand Tours:

Track Cycling

2008 UCI Track Cycling World Championships

Competition aerobatics

Cricket

Curling

Diving

Figure skating

Floorball

Gliding

Golf

Handball

Horse racing

Steeplechases Flat races

Ice hockey

Lacrosse

Mixed martial arts

The following is a list of major noteworthy MMA events by month. January 1/19 – UFC 80: Rapid Fire 1/23 – UFC Fight Night: Swick vs Burkman 1/25 – ShoXC 4 February 2/1 – Strikeforce: Young Guns II 2/2 – UFC 81: Breaking Point 2/13 – WEC 32: Condit vs. Prater 2/16 – EliteXC: Street Certified 2/23 – Strikeforce: At The Dome 2/29 – IFL: Las Vegas (Start of 2008 IFL season) March 3/1 – UFC 82: Pride of a Champion 3/5 – World Victory Road Presents: Sengoku 1 (Sengoku Raiden Championship's first event) 3/15 – DREAM.1 (DREAM's first event) 3/21 – ShoXC 5 3/26 – WEC 33: Marshall vs. Stann 3/29 – Strikeforce: Shamrock vs. Le April 4/2 – UFC Fight Night: Florian vs Lauzon 4/4 – IFL: New Blood, New Battles 2 4/5 – ShoXC 6 4/11 YAMMA Pit Fighting 1 (YAMMA Pit Fighting's first and only event) 4/19 – UFC 83: Serra vs. St-Pierre 2 4/29 – DREAM.2 May 5/11 – DREAM.3 5/16 – IFL: Connecticut (Last IFL event; 2008 Season never completely finished) 5/18 – World Victory Road Presents: Sengoku 2 5/24 – UFC 84: Ill Will 5/31 – EliteXC: Primetime June 6/1 – WEC 34: Faber vs. Pulver 6/7 – UFC 85: Bedlam 6/8 – World Victory Road Presents: Sengoku 3 6/14 – EliteXC: Return of the King 6/15 – DREAM.4 6/21 – The Ultimate Fighter: Team Rampage vs Team Forrest Finale 6/27 – Strikeforce: Melendez vs. Thomson July 7/5 – UFC 86: Jackson vs. Griffin 7/19 – UFC: Silva vs. Irvin 7/19 – Affliction: Banned (Affliction's first event) 7/21 – DREAM.5 7/26 – EliteXC: Unfinished Business August 8/3 – WEC 35: Condit vs. Miura 8/9 – UFC 87: Seek And Destroy 8/15 – ShoXC 7 8/24 – World Victory Road Presents: Sengoku 4 September 9/6 – UFC 88: Breakthrough 9/13 – Strikeforce: Young Guns III 9/17 – UFC Fight Night: Diaz vs Neer 9/20 – Strikeforce: At The Mansion II 9/23 – DREAM.6 9/26 – ShoXC 8 9/28 – World Victory Road Presents: Sengoku 5 October 10/3 – Strikeforce: Payback 10/4 – EliteXC: Heat 10/10 – ShoXC 9 (Last EliteXC event) 10/18 – UFC 89: Bisping vs. Leben 10/25 – UFC 90: Silva vs. Côté November 11/1 – World Victory Road Presents: Sengoku 6 11/5 – WEC 36: Faber vs. Brown 11/15 – UFC 91: Couture vs. Lesnar 11/21 – Strikeforce: Destruction December 12/3 – WEC 37: Torres vs. Tapia 12/10 – UFC: Fight for the Troops 12/13 – The Ultimate Fighter: Team Nogueira vs Team Mir Finale 12/27 – UFC 92: The Ultimate 2008 12/31 – Dynamite!! 2008 (Event featured ten DREAM MMA bouts and eight K-1 kickboxing bouts)

Motorsport

Olympic Games

Paragliding

Polo

Radiosport

Rotorcraft

Rowing

Rugby league

Rugby union

Ski mountaineering

Tennis

Rafael Nadal claimed the World No. 1 ranking for the first time, on August 18, replacing Roger Federer

Water polo

Weightlifting