Surname Youngsuk (Youngsuk 
) , globally, is a rare last name. The family name Youngsuk is habitual in South Korea, where it is a rare surname, Thailand, and Cambodia, where it is a very rare surname. In absolute terms, it most frequently occurs in South Korea, China, and Thailand. More prevalently, Youngsuk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Youngsuk | Canada, Thailand, United States, South Korea, China |