Throughout the world, Ольгаа (Ольгаа 
, Olgaa 
) is a very rare feminine given name. The forename Ольгаа is habitual in Eastern Europe, particularly Russia, where it is a very rare girly name. More frequently, Ольгаа is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Ольгаа | Russia, Kazakhstan |
| Olgaa | Spain, India, Mexico, Indonesia, Italy |