This is a list of WBC Muaythai diamond champions, showing diamond champions certificated by the World Boxing Council Muaythai (WBC Muaythai). The WBC, which is one of the four major governing bodies in professional boxing, started certifying their own Muay Thai world champions in 19 different weight classes in 2005.
| No. | Name | Date winning | Date losing | data-sort-type="number" style="width:10%;" | Days | data-sort-type="number" style="width:10%;" | Defenses |
|---|---|---|---|---|---|---|---|
| 1 | align=left |  Phetmorakot Petchyindee Academy | October 4, 2019 | July 2021 | 0 | ||
| [1] | |||||||
| 2 | align=left |  Youssef Boughanem | July 17, 2021 | Current | 0 | ||
| No. | Name | Date winning | Date losing | data-sort-type="number" style="width:10%;" | Days | data-sort-type="number" style="width:10%;" | Defenses |
|---|---|---|---|---|---|---|---|
| 1 | align=left | Buakaw Banchamek | August 15, 2014 | Current | 0 | ||
| No. | Name | Date winning | Date losing | data-sort-type="number" style="width:10%;" | Days | data-sort-type="number" style="width:10%;" | Defenses |
|---|---|---|---|---|---|---|---|
| 1 | align=left | Saenchai PKSaenchaimuaythaigym | August 14, 2011 | Current | 0 | ||
| 2 | align=left | Singdam Kiatmuu9 | July 27, 2019 | Current | 0 | ||
| No. | Name | Date winning | Date losing | data-sort-type="number" style="width:10%;" | Days | data-sort-type="number" style="width:10%;" | Defenses |
|---|---|---|---|---|---|---|---|
| 1 | align=left | Ruth Ashdown | August 15, 2018 | Retired with title | Retired after winning | 0 | |