Westmorland County (2021 population: 163,576) is a county in the Canadian province of New Brunswick. It is located in the southeastern part of the province. It contains the fast-growing commercial centre of Moncton and its northern and eastern suburbs. Also located in the county are the university town of Sackville and the local tourist destination of Shediac.
Westmorland County is centrally located in the Maritimes and is New Brunswick's most populous county. Fishing and tourism are important industries along the Northumberland Strait shore, and there is some mixed farming in the Petitcodiac River Valley and in the Tantramar Marsh region. The city of Moncton accounts for half of the county's population and has developed as a major transportation, distribution, commercial and retail centre. Dorchester is the historic shire town.
The county, once a part of Cumberland County, Nova Scotia, was one of the original eight counties delineated shortly after the creation of the British colony of New Brunswick in 1784. Initially it included what is now Albert County and part of Saint John County.
Due to sweeping social reforms of the Louis Robichaud premiership, the counties no longer serve their role as regional local government and administrative units.
There were the eleven municipalities within Westmorland County before the 2023 local governance reforms (listed with 2021 figures):
There is one First Nations reserve in Westmorland County (population as of 2021):
The county is subdivided into seven parishes (listed by 2016 population):
As a census division in the 2021 Census of Population conducted by Statistics Canada, Westmorland County had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of , it had a population density of in 2021.
The dominant dialect of Acadian French spoken in Westmorland County is Chiac.
Highways and numbered routes that run through the county, including external routes that start or finish at the county limits:
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