Miramichi ( ) is the largest city in northern New Brunswick, Canada. It is situated at the mouth of the Miramichi River where it enters Miramichi Bay. The Miramichi Valley is the second longest valley in New Brunswick, after the Saint John River Valley.

The Miramichi River is a river located in the east-central part of New Brunswick, Canada. The river drains into Miramichi Bay in the Gulf of St. Lawrence. The name may have been derived from the Montagnais words "Maissimeu Assi", and it is today the namesake of the Miramichi Herald at the Canadian Heraldic Authority.