Welterweight (MMA)
The welterweight division in mixed martial arts contains different weight classes:
- The UFC's welterweight division, which groups competitors within 156 to 170 lb
- The ONE Championship's welterweight division, with upper limit at
Ambiguity and clarification
For the sake of uniformity, many American mixed martial arts websites refer to competitors between 156 and 170 lb as welterweights. This encompasses the Shooto middleweight division.
The welterweight limit, as defined by the Nevada State Athletic Commission and the Association of Boxing Commissions is 170 lb.
Professional Champions
Current champions
This table is not always up to date. Last updated April, 2019.| Organization | Reign began | Champion | Record | Defenses |
| UFC | March 2, 2019 |  Kamaru Usman | 16–1 | 1 |
| Bellator MMA | January 20, 2018 |  Douglas Lima | 20–5–1 | 0 |
| ONE Championship | October 25, 2019 |  Kiamrian Abbasov | 22–4 | 0 |
| British Association of Mixed Martial Arts |  Bubba Jerome | |||
| Fight Nights Global | April 6, 2019 |  Dmitry Bikrev | 11–3 | |
| KSW | October 6, 2018 |  Roberto Soldić | 15–3 | 0 |
| Titan FC | June 29, 2018 |  Uroš Jurišic | 10–0 | 0 |
| ACA | September 8, 2018 | Albert Tumenov | 20–4 | 0 |
| Legacy Fighting Alliance | Vacant | |||
| Cage Warriors | Oct 20, 2018 |  Ross Houston | 8–0 | 0 |
| Oktagon MMA | Mar 16, 2019 |  David Kozma | 25–10 | 0 |
Most wins in Welterweight title bouts
| Name | Promotion | Title bout wins | |
| 1. |  Georges St-Pierre | UFC | 12 |
| 2. |  Matt Hughes | UFC | 9 |
| 3. | Pat Miletich | UFC | 5 |
| 3. | Ben Askren | Bellator | 5 |
| 3. | Nick Diaz | WEC, Strikeforce | 5 |
| 3. | Carlos Condit | WEC, UFC | 5 |
| 4. | Tyron Woodley | UFC | 4 |
| 5. |  Douglas Lima | Bellator | 3 |
| 5. | Robbie Lawler | UFC | 3 |