|Administrative region||Central Macedonia|
|Highest elevation||40 m (130 ft)|
|Lowest elevation||35 m (115 ft)|
|Time zone||UTC+2 (EET)|
|• Summer (DST)||UTC+3 (EEST)|
|Vehicle registration||NAx-xxxx to NXx-xxxx|
Kastanas (Greek: Καστανάς, [kasta'nas]) is a village of the Chalkidona municipality. Before the 2011 local government reform it was part of the municipality of Koufalia. The 2011 census recorded 630 inhabitants in the village. Kastanas is a part of the community of Prochoma.
The population of Kastanas consists mainly of Greek refugees from İzmit, but there are also smaller numbers of Sarakatsani and Greek refugees from Bulgaria. The village was formerly known as Kara Oglu (Greek: Καρά Ογλού, [ka'ɾa o'ɣlu], from Turkish: Kara Oğlu).
- "Απογραφή Πληθυσμού - Κατοικιών 2011. ΜΟΝΙΜΟΣ Πληθυσμός" (in Greek). Hellenic Statistical Authority.
- Kallikratis law Greece Ministry of Interior (in Greek)
- Καστανάς (in Greek). Municipality of Chalkidona. Retrieved 12 October 2014.