Gloucester County was set off from Northumberland County in 1826. It is located in the northeastern corner of New Brunswick; bounded on the north by the Bay of Chaleur, on the east by the Gulf of St. Lawrence, on the west by Restigouche County and on the south by Northumberland County.

Parishes of Gloucester County: Allardville Bathurst Beresford Caraquet Inkerman New Brandon Paquetville Shippegan Saint-Isidore Saumarez 

Pre-1826 data for Gloucester County may be found in the records for Northumberland County.