Lohtaja (Swedish: Lochteå) is a former municipality of Finland.
It is located in the province of Western Finland and is part of the Central Ostrobothnia region.
Lohtaja is popular for its coastline, Vattajaniemi, which is the longest beach in Scandinavia.
[citation needed] However, the coastline is partly used by the military as a drill-area.
An association called Pro Vattaja was founded to campaign for the area to be saved for civil use.