Surname Кирка (Кирка 
, Kirko 
, Kirka 
) , worldwide, is quite a rare family name. The family name Кирка is habitual in Bulgaria, where it is quite a rare surname, Slovakia, and Lithuania. Not in comparison with a country's population, it is commonest in Turkey, Russia, and Bulgaria. Also, Кирка is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Кирка | Kyrgyzstan, Russia, Bulgaria, Kazakhstan, Ukraine |
| Kirko | North Macedonia, Bulgaria, United States, Poland, India |
| Kirka | Slovakia, Turkey, Bulgaria, Lithuania, United States |