| Pefkaki | |
| Coordinates: | 40.1056°N 21.6214°W |
| Periph: | Western Macedonia |
| Periphunit: | Grevena |
| Municipality: | Grevena |
| Municunit: | Ventzio |
| Community: | Knidi |
| Licence: | ΚΖ |
| Georegion: | Macedonia |
Pefkaki (el|Πευκάκι, before 1963: Κολοκυθάκι – Kolokithaki) was a village in Grevena Regional Unit, Macedonia, Greece. It was part of the community of Knidi.
Following the Greek–Turkish population exchange, Greek refugee families in Kolokithaki were from Pontus (39) in 1926. The 1928 Greek census recorded 106 village inhabitants. In 1928, the refugee families numbered 39 (114 people).[1] The village was abolished on 5 April 1981.[2]