The Halil Bey Mosque (Greek: Τζαμί Χαλίλ Μπέη, from Turkish: Halil Bey Camii) is a historical Ottoman-era mosque in the town of Kavala, Eastern Macedonia and Thrace, in Greece.

It is located in the center of the small peninsula in the port, near the old fortress, and was probably built around the 1530s, which is also when Ibrahim Pasha Mosque is dated.

[2] After the Balkan Wars, the mosque along with the greater Kavala region became part of the Kingdom of Greece.

[2] After a series of restoration works for both the mosque and the madrasa (but not the minaret), it is now open to public and functions as a museum and a venue hall.

[1][2] The mosque was part of a wider complex that also included a madrasa which had eight rooms for students and which has also been preserved in good condition.