Lachanas () is a village and a former municipality in the Thessaloniki regional unit, Greece. Since the 2011 local government reform it is part of the municipality Lagkadas, of which it is a municipal unit. The seat of the municipality was in Xylopoli. The municipal unit Lachanas has an area of 210.090 km<sup>2</sup>, and the community Lachanas has an area of 47.602 km<sup>2</sup>.
The population of the municipal unit was 1,943 inhabitants in 2021 and that of the community was 462 inhabitants.
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