Family name สายทอง (สายทอง 
, Saithong 
, Saitong 
) , across the world, is a common cognomen. The last name สายทอง is habitual in Thailand, where it is quite a common surname, Laos, where it is quite a rare surname, and Slovakia, where it is a rare surname. Measured by absolute frequency, it is the most numerous in South-eastern Asia, particularly Thailand, Laos, and Myanmar. Also, สายทอง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สายทอง, Sai Thong | Thailand |
| Saithong | Laos, Thailand, United States, Myanmar, Slovakia |
| Saitong | Malaysia, Thailand, United States, India, Myanmar |
Gold Line, Luadthong, Paithong, Saaingthong, Saaythong, Saegthong, Saeingthong, Saewthong, Saeythong, Saimthong, Sairadthong, Saisingthong, Saisithong, Saithomg, Saithorng, Saitongon, Saiythong, Sareethong, and Seesaithong
| สวรรค์พิมพ์ สายทอง badminton player, TH (b. 1950) |
|