Family name Usasiri (อุษาศิริ 
, Usasiri ) , in the world, is an extremely rare last name. The family name Usasiri is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, Usasiri is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| อุษาศิริ, Usasiri | Thailand |