Cognomen Glasko (Glasko 
) , throughout the world, is a very rare last name. The surname Glasko is habitual in Bulgaria, where it is a rare surname, the United States, where it is a very rare surname, and Canada. Not in comparison with a country's population, it most frequently occurs in the United States, Bulgaria, and France.
| VARIANT | COUNTRY |
|---|---|
| Glasko | Bulgaria, United States, Canada, France |