Strikeforce was an American mixed martial arts organization. It crowned male champions in the lightweight, welterweight, middleweight, light heavyweight and heavyweight divisions, and female champions in featherweight and bantamweight.
206lb to 265lb
| width=1% | No. | width=19% | Name | width=17% | Event | width=13% | Date | width=8% | Reign | width=50% | Defenses |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | November 16, 2007 | days | |||||||||
| align=center colspan=6 | Overeem vacated the title on July 29, 2011 when his contract was absorbed by the UFC.[1] |
186lb to 205lb
| width=1% | No. | width=21% | Name | width=19% | Event | width=13% | Date | width=8% | Reign | width=46% | Defenses |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Bobby Southworth | December 8, 2006 | days | ||||||||
| 2 |  Renato Sobral | November 21, 2008 | days | ||||||||
| 3 | Gegard Mousasi | August 15, 2009 | days | ||||||||
| 4 | April 17, 2010 | days | |||||||||
| 5 | Rafael Cavalcante | days | August 21, 2010 | days | |||||||
| 6 | Dan Henderson | March 5, 2011 | days | ||||||||
| align=center colspan=6 | Henderson vacated the title on September 19, 2011 when his contract was absorbed by the UFC.[2] |
171lb to 185lb
| width=1% | No. | width=19% | Name | width=17% | Event | width=13% | Date | width=8% | Reign | width=50% | Defenses |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Strikeforce: Shamrock vs. Baroni | June 22, 2007 | days | ||||||||
| 2 | Cung Le | March 29, 2008 | days | ||||||||
| align=center colspan=6 | Le vacated the title on September 17, 2009 due to filming obligations.[3] | ||||||||||
| 3 | Jake Shields | November 7, 2009 | days | ||||||||
| align=center colspan=6 | Shields vacated the title on July 1, 2010 when signed with the UFC.[4] | ||||||||||
| 4 | Ronaldo Souza | August 21, 2010 | days | ||||||||
| 5 | Luke Rockhold | September 10, 2011 | days | ||||||||
| align=center colspan=6 | The Strikeforce Middleweight title was vacated after the Strikeforce banner was dissolved into the UFC on January 12, 2013. |
156lb to 170lb
| width=1% | No. | width=19% | Name | width=17% | Event | width=13% | Date | width=8% | Reign | width=50% | Defenses |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Nick Diaz | January | days | ||||||||
| align=center colspan=6 | Diaz vacated the title on June 9, 2011 when his contract was absorbed by the UFC.[5] | ||||||||||
| 2 | Nate Marquardt | July 14, 2012 | days | ||||||||
| 3 | January 12, 2013 | days | |||||||||
| align=center colspan=6 | The Strikeforce Welterweight title was vacated after the Strikeforce banner was dissolved into the UFC on January 12, 2013. |
146lb to 155lb
| width=1% | No. | width=19% | Name | width=20% | Event | width=13% | Date | width=8% | Reign | width=47% | Defenses |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Clay Guida | March 10, 2006 | days | ||||||||
| 2 | Gilbert Melendez | June 9, 2006 | days | ||||||||
| 3 | Josh Thomson | June 27, 2008 | days | ||||||||
| — | Gilbert Melendez | April 11, 2009 | — | ||||||||
| 4 | Gilbert Melendez (2) | December 19, 2009 | days | ||||||||
| align=center colspan=6 | The Strikeforce Lightweight Title was unified with the UFC Lightweight Title on April 20, 2013, when Benson Henderson defeated Melendez at . |
136lb to 145lbFormerly known as the Women's Lightweight Championship and the Women's Middleweight Championship
| width=1% | No. | width=19% | Name | width=20% | Event | width=13% | Date | width=8% | Reign | width=47% | Defenses |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | August 15, 2009 | days | |||||||||
| align=center colspan=6 | Cyborg was stripped of the title on January 6, 2012 after testing positive for anabolic steroids in a post-fight drug test.[6] |
126lb to 135lbFormerly known as the Women's Welterweight Championship
| width=1% | No. | width=19% | Name | width=17% | Event | width=13% | Date | width=8% | Reign | width=50% | Defenses |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Sarah Kaufman | February 26, 2010 | days | ||||||||
| 2 | October 9, 2010 | days | |||||||||
| 3 | Miesha Tate | July 30, 2011 | days | ||||||||
| 4 | Ronda Rousey | March 3, 2012 | days | ||||||||
| align=center colspan=6 | The title was vacated on December 6, 2012 when Rousey became the first UFC Women's Bantamweight Champion.[7] |
170lb to 185lb
| width=1% | No. | width=19% | Name | width=20% | Event | width=13% | Date | width=13% | Reign | width=47% | Defenses |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | align=left | Eugene Jackson | align=center | align=center | December 8, 2006 | align=center | days | ||||
| The Strikeforce Middleweight U.S. title was vacated after the Strikeforce banner was dissolved into the UFC on January 12, 2013. | |||||||||||
145lb to 155lb
| width=1% | No. | width=19% | Name | width=20% | Event | width=13% | Date | width=8% | Reign | width=47% | Defenses |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | align=left | Josh Thomson | align=center | align=center | December 8, 2006 | align=center | days | ||||
| The Strikeforce Lightweight U.S. title was vacated after the Strikeforce banner was dissolved into the UFC on January 12, 2013. | |||||||||||
| Event | Division | Winner | Runner-up | Date | ||||
|---|---|---|---|---|---|---|---|---|
| align=center | align=center | Middleweight | Jorge Santiago | Trevor Prangley | align=center | November 17, 2007 | ||
| align=center | align=center | Women's Bantamweight | Miesha Tate |  Hitomi Akano | align=center | August 13, 2010 | ||
| align=center | align=center | Heavyweight | Daniel Cormier | Josh Barnett | align=center | May 19, 2012 |
| Title wins | Champion | Division | V | D | NC | L |
|---|---|---|---|---|---|---|
| 9 | Gilbert Melendez | Lightweight | 9 | 0 | 0 | 1 |
| 4 | Nick Diaz | Welterweight | 4 | 0 | 0 | 1 |
| 3 | Cristiane Justino | Women's Featherweight | 3 | 0 | 1 | 0 |
| Luke Rockhold | Middleweight | 3 | 0 | 0 | 0 | |
| 2 | Bobby Southworth | Light Heavyweight | 2 | 0 | 0 | 1 |
| Sarah Kaufman | Women's Bantamweight | 2 | 0 | 0 | 1 | |
| Ronaldo Souza | Middleweight | 2 | 0 | 0 | 1 | |
| Marloes Coenen | Women's Bantamweight | 2 | 0 | 0 | 1 | |
| Jake Shields | Middleweight | 2 | 0 | 0 | 0 | |
| Alistair Overeem | Heavyweight | 2 | 0 | 0 | 0 | |
| Ronda Rousey | Women's Bantamweight | 2 | 0 | 0 | 0 |
| Defenses | Champion | Division | Period |
|---|---|---|---|
| 4 | Gilbert Melendez | Lightweight | April 19, 2009 – January 12, 2013 |
| 3 | Nick Diaz | Welterweight | January 30, 2010 – June 9, 2011 |
| 2 | Cristiane Justino | Women's Featherweight | August 15, 2009 – January 6, 2012 |
| Luke Rockhold | Middleweight | September 10, 2011 – January 12, 2013 | |
| 1 | Bobby Southworth | Light Heavyweight | December 8, 2006 – November 21, 2008 |
| Jake Shields | Middleweight | November 7, 2009 – July 1, 2010 | |
| Alistair Overeem | Heavyweight | November 16, 2007 – July 29, 2011 | |
| Sarah Kaufman | Women's Bantamweight | February 26, 2010 – October 9, 2010 | |
| Ronaldo Souza | Middleweight | August 21, 2010 – September 10, 2011 | |
| Marloes Coenen | Women's Bantamweight | October 9, 2010 – July 30, 2011 | |
| Ronda Rousey | Women's Bantamweight | March 3, 2012 – December 6, 2012 |
The division champions include only linear and true champions. Interim champions who have never become linear champions will be listed as interim champions. Fighters with multiple title reigns in a specific division will also be counted once. Runners-up are not included in tournaments champions.
| Country | Division champions | Tournaments champions | Total | |
|---|---|---|---|---|
| 14 | 2 | 16 | ||
| 4 | 1 | 5 | ||
| 3 | — | 3 | ||
| 1 | — | 1 | ||
| 1 | — | 1 | ||
| 1 | — | 1 |