Family name Smuin (Smuin 
) , throughout the world, is a rare cognomen. The last name Smuin is characteristic of the United States, where it is a very rare surname, Canada, and Australia.
| VARIANT | COUNTRY |
|---|---|
| Smuin | United Kingdom, United States, Canada, Australia |
|
dick smuin American basketball player and high school teacher and coach, US (b. 1925) |
|
| michael smuin American dancer, US (b. 1938) |
|