Surname Ольта (Ольта 
) , globally, is a very rare family name. The cognomen Ольта is characteristic of Kazakhstan, where it is a rare surname, Russia, where it is an extremely rare surname, and Ukraine. Much less frequently, Ольта is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ольта | Kazakhstan, Ukraine, Russia |