The closest beach to Paleochori (Mainland Halkidiki) is Psakoudia Beach, 23.7 km away. Ordered by distance from Paleochori. Photos, map, reviews.
23.7 km from Paleochori

24.0 km from Paleochori

28.9 km from Paleochori

29.2 km from Paleochori

32.2 km from Paleochori

33.2 km from Paleochori

33.5 km from Paleochori

34.1 km from Paleochori

34.5 km from Paleochori

34.5 km from Paleochori

35.1 km from Paleochori

35.1 km from Paleochori

Psakoudia Beach, just 23.7 km from Paleochori. The rest are listed below, ordered by distance.
None sit within 15 km of Paleochori itself, but Mainland Halkidiki has 21 beaches in total — listed below, closest first.
Based on user reviews: Nea Moudania (★4.0), Psakoudia Beach (★3.8), Karagatsia (★3.8).
The beaches are spread out around Paleochori. A car makes exploring much easier — local buses and taxis are limited outside peak season.
Paleochori is on the Mainland Halkidiki side of Halkidiki, in northern Greece. The nearest airport is Thessaloniki (SKG); from there a car is the most convenient way to reach the Mainland Halkidiki villages.