Family name Rupinskas (Rupinskas 
) , worldwide, is a very rare cognomen. The cognomen Rupinskas is characteristic of Lithuania, where it is quite a rare surname, Australia, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Lithuania, the United States, and the United Kingdom.
| VARIANT | COUNTRY |
|---|---|
| Rupinskas | United States, Lithuania, United Kingdom, Australia |