Lac Baker (meaning "Lake Baker") is a Canadian lake with an area of 6 km2 located in northwestern New Brunswick on the border with Quebec.

The northern part of the lake stretches 0.8 kilometres (0.50 mi) to the northwest, in the municipality of Saint-Jean-de-Lande in Quebec province.

This lake has a central island with a length of 1.2 kilometres (0.75 mi) and a maximum width of 0.3 kilometres (0.19 mi), counting about fifty chalets.

This lake is supplied in term of water from Kitchen Creek (from the West, i.e. from the Quebec).

The lake is surrounded by a road for cottages arranged around it.