Saint Irénée and Alderwood is an unincorporated place in New Brunswick, Canada. It is recognized as a designated place by Statistics Canada.
In the 2021 Census of Population conducted by Statistics Canada, Saint Irénée and Alderwood had a population of 827 living in 332 of its 338 total private dwellings, a change of from its 2016 population of 847. With a land area of , it had a population density of in 2021.
It was formerly a local service district in Gloucester County, New Brunswick. It is now part of the Regional Municipality of Grand TracadieâÂÂSheila.