Family name สังสิทธิ์ (สังสิทธิ์ 
, Sangsit 
) , around the globe, is a rare last name. The surname สังสิทธิ์ is habitual in Thailand, where it is a rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. Likewise, สังสิทธิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สังสิทธิ์ | Thailand |
| Sangsit | United States, United Kingdom, India, Thailand |