Koukaki (Greek: Κουκάκι or Κουκάκη, pronounced [kuˈkaci]) is a southeast neighbourhood of Athens, Greece.

Koukaki is served by two Athens Metro stations, Akropoli (near the Acropolis) and Syngrou–Fix (on Andrea Syngrou Avenue).

Koukaki is served by both lines (Syntagma-SEF and Syntagma-Kolimvitirio) of the Athens Tram (L. Vouliagmenis and Fix stops).

Koukaki is served by a large number of bus routes along Andrea Syngrou Avenue, including 040, 106, 126, 136, 137, 230, A2, B2.

In terms of trolley bus, Routes 1, 5, and 15 have stops along Veikou and Dimitrakopoulou streets.