|Administrative region:||Central Macedonia|
|Population statistics (as of 2011)|
|- Area:||219.318 km2 (85 sq mi)|
|- Density:||22 /km2 (58 /sq mi)|
|Time zone:||EET/EEST (UTC+2/3)|
Petra (Greek: Πέτρα) is a former municipality in Pieria regional unit, Greece. Since the 2011 local government reform it is part of the municipality Katerini, of which it is a municipal unit. The population was 4,888 in 2011. The seat of the municipality was in Milia. Petra is also the name of a small settlement that is within the boundaries of the municipal unit, that had a population of 37 in 2011.
- Travels in northern Greece By William Martin Leake page 337 ISBN 1-4021-6770-9
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