Madawaska County was set off from Victoria County in 1873. Before that it was part of York and then Carleton Counties. Madawaska County is located in the northwestern corner of New Brunswick. To the north lies Restigouche County; to the east, Victoria County; to the south, the state of Maine; and to the west, the Province of Quebec.

Parishes of Madawaska County: Baker Brook Clair Lac Baker Madawaska Notre-Dame-de-Lourdes Riviere-Verte Saint-Andre Sainte-Anne Saint-Basile Saint-Francois Saint-Hilaire Saint-Jacques Saint-Joseph Saint-Leonard 

Official records for the period prior to the formation of the county in 1873 may be found in those of York, Carleton and Victoria Counties.