Family name สิงทอง (Singthong 
, สิงทอง ) , in the entire world, is quite a rare cognomen. The last name สิงทอง is habitual in Laos, where it is quite a rare surname, Thailand, and Italy, where it is a very rare surname. In absolute terms, it most frequently occurs in Thailand, Laos, and China. Much less frequently, สิงทอง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Singthong | Thailand, Italy, Laos, United States, China |
| สิงทอง | Thailand |