Following the name of the champion(s): Indicates the number of times the competitor has held that title at that point.
[...]
Indicates a gap in the listing where title changes are not known.
<
Title was held or changed hands no later than this. In these cases, it is known that a competitor held the title at a certain time but not when he/she won it.
@
Order uncertain. Different titleholders may be known for the same year, for example, but it is not known who held the title before whom.
#
Unofficial or disputable claims. These are usually matches that certainly took place, but where there is doubt that the competitor shown should be recognized as a true title holder. These listings are also italicized.
Rajadamnern Stadium
Welterweight Title [66.6kg/147lb] (as of 2026-03-07)
Because it is difficult to find comprehensive muay thai results in English, these lists are always "under construction." Also, Thai competitors change their names when they switch their gym affiliations, and the names on this list may not be always accurate. If you have corrections or additional information, please send in (with specifying the source, of course).
* Bolded letters in the competitor's name, if any, indicate the surname/family name.
Boonmee Maechamang
1955
Defeats Yodying Luksurin to become the first champion.
[...]
Samart Sorndaeng
1955
[...]
Srisawat Thiamprasit (SitSor.Por.)
1959<
Defeats Boonmee Rajawat; stripped of the title losing a non-title match in 61-12.
Apidej Sit-Hirun
1962
Defeats Sornchai Mallayuth; still champion as of 63-09-09; vacant as of 66.
