| # | Wrestler: | Times: | Date: | Place: | Event: | Notes: | Ref. |
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| IWA Extreme Cruiserweight Championship | |
| 1 | Blitz | 1 | December 9, 2006 | Bayamón, Puerto Rico | Christmas in PR (2006) | Defeated Amazona to win the title in a tournament final. | [2] |
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| 2 | Tommy Diablo | 1 | March 4, 2007 | Guanica, Puerto Rico | IWA TV Taping | | [3] |
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| 3 | "El Lucha" Phoenix Star | 1 | May 19, 2007 | Carolina, Puerto Rico | Juicio Final (2007) | | [4] |
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| 4 | El Sensacional Carlitos | 1 | June 16, 2007 | Bayamón, Puerto Rico | II Copa José Miguel Pérez | | [5] [6] |
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| 5 | Hiram Tua | 1 | October 13, 2007 | Bayamón, Puerto Rico | Hardcore Weekend (2007) | | [7] [8] |
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| — | Vacated | — | April 5, 2008 | Toa Baja, Puerto Rico | | | [9] |
| 6 | El Niche | 1 | May 17, 2008 | Bayamón, Puerto Rico | Juicio Final VIII | Defeated Erik Escorpion in tournament final. | [10] [11] [12] |
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| 7 | Death Warrant | 1 | July 19, 2008 | Bayamón, Puerto Rico | Summer Attitude (2008) | | [13] [14] |
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| 8 | Onix | 1 | August 16, 2008 | Bayamón, Puerto Rico | Road to Armageddon | | [15] [16] |
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| 9 | Noel Rodríguez | 1 | October 4, 2008 | Bayamón, Puerto Rico | Golpe de Estado (2008) | Defeated Giant Manson, Hardam Kadafi, El Niche, Onix, Rain Stain, Rick Stanley, Spectro and Zaer Arafat in a 9-way elimination match for the IWA Hardcore, Extreme Cruiserweight and Puerto Rico Heavyweight titles. | [17] |
|---|
| — | Unified | — | October 4, 2008 | Bayamón, Puerto Rico | Golpe de Estado (2008) | Title unified with IWA Hardcore and Puerto Rico Heavyweight titles respectively, later in the same date the title was retired. | [18] |
| IWA Extreme Combat Division Championship | |
| 10 | Cuervo | 1 | July 18, 2009 | Bayamón, Puerto Rico | IWA 10th Anniversary | Defeated Cold, Empio, Mike Piconose, Psycho and Vértigo in a 6-way X match to become the first IWA Extreme Combat Division Champion. | |
|---|
| 11 | Vertigo | 1 | October 10, 2009 | Bayamón, Puerto Rico | IWA TV Taping | | [19] |
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| 12 | Cuervo | 2 | October 31, 2009 | Yauco, Puerto Rico | Halloween Mayhem (2009) | | [20] |
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| — | Vacated | — | December 13, 2009 | — | | When Cuervo jumped to WWC. | |
| 13 | Empio | 1 | January 6, 2010 | Bayamón, Puerto Rico | Histeria Boricua (2010) | Won a 7-man battle royal for the vacant title. | [21] |
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| 14 | Lash | 1 | January 30, 2010 | Levittown, Puerto Rico | IWA TV Taping | | [21] |
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| 15 | Átomo | 1 | February 27, 2010 | Las Marías, Puerto Rico | IWA TV Taping | | [22] |
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| 16 | Starky | 1 | March 13, 2010 | Cayey, Puerto Rico | Noche de Campeones (2010) | After Átomo defeated Empio and Lash in 3-way match to retain the title, Starky Challenged Átomo to be the new Extreme Combat Division Champion. | [23] |
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| 17 | Julian Jamrock | 1 | May 1, 2010 | Toa Alta, Puerto Rico | 1ra Ronda Copa Alcalde | | [24] |
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| 18 | Lash | 2 | June 6, 2010 | Yabucoa, Puerto Rico | IWA TV Taping | | [25] |
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| 19 | Havoc | 1 | October 16, 2010 | Bayamón, Puerto Rico | Hardcore Weekend (2010) | Defeated Lash in a No DQ match. | [26] |
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| — | Vacated | — | March 5, 2011 | Manatí, Puerto Rico | — | When Havoc is injured. | |
| IWA Cruiserweight Championship | |
| 20 | Havoc | 2 | April 2, 2011 | Toa Baja, Puerto Rico | Juicio Final (2011) | Defeated Lash, Enigma and Sónico in a 4-way X match. | [27] |
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| 21 | Riddix | 1 | April 30, 2011 | Bayamón, Puerto Rico | Clash of the Titans (2011) | Defeated Havoc, Lash and Psycho in a 4-way match. | [28] |
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| IWA Television Championship | |
| 22 | Enigma | 1 | June 4, 2011 | Orocovis, Puerto Rico | Guerra en la Montaña | Change explained in-story as a result of the incumbent outgrowing the cruiserweight division. | [29] |
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| 23 | Lash | 3 | July 30, 2011 | Bayamón, Puerto Rico | Summer Attitude (2011) | | [30] |
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| 24 | Sr. C | 1 | January 28, 2012 | Toa Alta, Puerto Rico | Histeria Boricua (2012) | Defeated Enigma in a 4-way one night tournament. Some days later Sr. C renamed the title "IWA Yoú Tu Championship" (a reference to YouTube, since the promotion was no longer airing its shows on television). | [31] [32] |
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| — | Inactive | — | June 16, 2012 | — | — | Title was deactivated when IWA closed. The belt (in its Yoú Tu Championship version) reappeared in the World Wrestling League (WWL) during the spring of 2017 being carried by Sr. C. The "IWA" acronym was later covered. It was not defended during these appearances. | |