Family name Усар (Усар 
) , around the globe, is a very rare last name. The cognomen Усар is habitual in Kyrgyzstan, where it is a rare surname, Ukraine, and Russia, where it is an extremely rare surname. More prevalently, Усар is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Усар | Uzbekistan, Kazakhstan, Russia, Ukraine, Tajikistan |