Paionia (Greek: Παιονία, pronounced [peoˈnia]) is a municipality in the Kilkis regional unit of Central Macedonia, Greece.

The seat of the municipality is the town Polykastro.

[2] The municipality is named after the ancient region of Paeonia.

[3] The municipality Paionia was formed at the 2011 local government reform by the merger of the following 5 former municipalities, that became municipal units:[2] The province of Paionia (Greek: Επαρχία Παιονίας) was one of the provinces of the Kilkis Prefecture.

This Central Macedonia location article is a stub.