| Date | Event | Alternate Name/s | Location | Attendance | PPV Buyrate | Notes |
| January 1 | UFC 125: Resolution | — |  Las Vegas, Nevada, USA | 12,874 | 270,000 | — |
| January 22 | UFC: Fight For The Troops 2 | UFC Fight Night 23 | Killeen, Texas, USA | 3,200 | — | — |
| January 29 | Strikeforce: Diaz vs. Cyborg | — | San Jose, California, USA | 9,059 | — | — |
| February 5 | UFC 126: Silva vs. Belfort | — | Las Vegas, Nevada, USA | 10,893 | 725,000 | — |
| February 12 | Strikeforce / M-1 Global: Fedor vs. Silva | Strikeforce: Fedor vs. Silva | East Rutherford, New Jersey, USA | 11,287 | — | Quarterfinals to 2011 Strikeforce Heavyweight GP tournament. |
| February 25 | MFC 28: Supremacy | — |  Edmonton, Alberta, Canada | — | — | — |
| February 26 | UFC 127: Penn vs. Fitch | — |  Sydney, Australia | 18,186 | 260,000 | — |
| February 26 | BAMMA 5: Daley vs. Shirai | — |  Manchester, England | — | — | — |
| March 3 | UFC Live: Sanchez vs. Kampmann | — | Louisville, Kentucky, USA | 8,319 | — | — |
| March 5 | Strikeforce: Feijao vs. Henderson | Strikeforce: Columbus | Columbus, Ohio, USA | 7,123 | — | — |
| March 5 | Bellator XXXV | — | Lemoore, California, USA | — | — | Start of Bellator Season 4. |
| March 12 | Bellator XXXVI | — | Shreveport, Louisiana, USA | — | — | — |
| March 19 | Bellator XXXVII | — | Concho, Oklahoma, USA | — | — | — |
| March 19 | UFC 128: Shogun vs. Jones | — | Newark, New Jersey, USA | 12,619 | 445,000 | — |
| March 26 | Bellator XXXVIII | — | Tunica, Mississippi, USA | — | — | — |
| March 26 | UFC Fight Night: Nogueira vs. Davis | UFC Fight Night 24 UFC Fight Night: Seattle | Seattle, USA | 13,741 | — | — |
| April 2 | Bellator XXXIX | — | Uncasville, Connecticut, USA | — | — | — |
| April 8 | MFC 29: Conquer | — | Windsor, Ontario, Canada | — | — | — |
| April 9 | Bellator XL | — | Newkirk, Oklahoma, USA | — | — | — |
| April 9 | Strikeforce: Diaz vs. Daley | — | San Diego, California, USA | — | — | — |
| April 16 | Bellator XLI | — | Yuma, Arizona, USA | — | — | — |
| April 23 | Bellator XLII | — | Concho, Oklahoma, USA | — | — | — |
| April 30 | UFC 129: St-Pierre vs. Shields | — | Toronto, Ontario, Canada | 55,724 | 800,000 (Min.)
900,000 (Max.) | Randy Couture announces his retirement after nearly 14 years of competition. |
| May 6 | Tachi Palace Fights 9 | — | Lemoore, California, USA | — | — | — |
| May 7 | Bellator XLIII | — | Newkirk, Oklahoma, USA | — | — | — |
| May 14 | Bellator XLIV | — | Atlantic City, New Jersey, USA | — | — | — |
| May 21 | Bellator XLV | — | Lake Charles, Louisiana, USA | — | — | End of Bellator season 4. |
| May 21 | BAMMA 6: Watson vs. Ninja | — | London, England | — | — | Murilo Rua announces his retirement after 11 years of competition. |
| May 29 | Dream: Fight for Japan! | Dream Japan GP – 2011 Bantamweight Japan Tournament |  Saitama, Japan | 6,522 | — | — |
| June 4 | The Ultimate Fighter 13 Finale | — | Las Vegas, Nevada, USA | — | — | — |
| June 10 | MFC 30: Up Close and Personal | — | Edmonton, Alberta, Canada | — | — | — |
| June 11 | UFC 131: dos Santos vs. Carwin | — | Vancouver, British Columbia, Canada | 14,685 | 325,000 (Min.)
335,000 (Max.) | — |
| June 18 | Strikeforce: Overeem vs. Werdum | Strikeforce: Dallas | Dallas, Texas, USA | — | — | The event will feature the first women's bouts ever held by Zuffa. |
| June 25 | Bellator XLVI | — | Hollywood, Florida, USA | — | — | Start of Bellator 2011 Summer Series. |
| June 26 | UFC Live: Kongo vs. Barry | — | Pittsburgh, Pennsylvania, USA | 7,792 | — | — |
| July 2 | UFC 132: Cruz vs. Faber 2 | — | Las Vegas, Nevada, USA | 13,109 | 350,000 (Min.)
375,000 (Max.) | — |
| July 16 | Dream: Japan GP Final | — | Tokyo, Japan | 8,142 | — | — |
| July 23 | Bellator XLVII | — | Rama, Ontario, Canada | — | — | — |
| July 30 | Strikeforce: Fedor vs. Henderson | — | Hoffman Estates, Illinois, USA | — | — | — |
| August 6 | UFC 133: Evans vs. Ortiz 2 | — | Philadelphia, Pennsylvania, USA | 11,583 | — | — |
| August 14 | UFC Live: Hardy vs. Lytle | — | Milwaukee, Wisconsin, USA | 6,751 | — | — |
| August 20 | Bellator XLVIII | — | Uncasville, Connecticut, USA | — | — | End of Bellator 2011 Summer Series. |
| August 27 | UFC 134: Silva vs. Okami | UFC: Rio |  Rio de Janeiro, Brazil | — | — | — |
| September 3 | ONE FC: Champion vs. Champion | — |  Kallang, Singapore | — | — | — |
| September 10 | Strikeforce: Heavyweight Grand Prix Semifinals | — | Cincinnati, Ohio, USA | — | — | — |
| September 10 | Bellator XLIX | — | Atlantic City, New Jersey, USA | — | — | Start of Bellator Season 5 |
| September 10 | BAMMA 7 | — | Birmingham, England | — | — | — |
| September 17 | UFC Fight Night: Battle on the Bayou | UFC Fight Night 25 | New Orleans, Louisiana, USA | — | — | — |
| September 17 | Bellator L | — | Hollywood, Florida, USA | — | — | — |
| September 24 | Dream 17 | — | Saitama, Japan | — | — | — |
| September 24 | Bellator LI | — | Canton, Ohio, USA | — | — | — |
| September 24 | UFC 135 | — | Denver, Colorado, USA | — | — | — |
| October 1 | UFC on Versus 6 | — | Washington, D.C., USA | — | — | — |
| October 1 | Bellator LII | — | Lake Charles, Louisiana, USA | — | — | — |
| October 8 | UFC 136: Edgar vs. Maynard III | — | Houston, Texas, USA | — | — | — |
| October 8 | Bellator LIII | — | USA | — | — | — |
| October 15 | Bellator LIV | — | Atlantic City, New Jersey, USA | — | — | — |
| October 29 | UFC 137: St-Pierre vs. Diaz | — | Las Vegas, Nevada, USA | — | — | — |
| November 5 | UFC 138: Leben vs. Muñoz | — | Birmingham, England | — | — | The main event was the first five-round non-title fight in the history of the UFC. |
| November 12 | UFC on Fox: Velasquez vs. Dos Santos | — | Anaheim, California, USA | — | — | The UFC's debut on the Fox Network. |
| November 19 | Bellator Event | — | Hollywood, Florida, USA | — | — | End of Bellator Season 5. |
| December 3 | The Ultimate Fighter 14 Finale | — | Las Vegas, Nevada USA | — | — | — |
| December 10 | UFC 140 | — | Toronto, Ontario, Canada | — | — | — |
| December 31 | Fight For Japan: Genki Desu Ka Omisoka 2011 | Fight for Japan. How are you! New Year! 2011 | Saitama, Japan | 24,606 | — | — |
