Father Lake is a freshwater body, a tributary of Doda Lake, in the southern part of Eeyou Istchee James Bay (municipality), in the administrative region of Nord-du-Québec, in the province of Quebec, in Canada.

The area of Father Lake extends into the townships of Picquet, Royal and Du Guesclin on the territory of the Eeyou Istchee James Bay (municipality) Regional Government, southwest of Chapais, Quebec.

The watershed of Father Lake is accessible via the R1051 forest road from the north, serving the large peninsula that stretches east for 15 kilometres (9.3 mi).

The large bays of this peninsula give the shape of an F at Father Lake.

The form "Doda Sagahaigan or Father's L." is indicated in 1900 on a map of the surveyor Henry O'Sullivan.