Castor River North is a local service district and designated place in the Canadian province of Newfoundland and Labrador.
Castor River North is in Newfoundland within Subdivision C of Division No. 9.
As a designated place in the 2016 Census of Population conducted by Statistics Canada, Castor River North recorded a population of 141 living in 55 of its 57 total private dwellings, a change of from its 2011 population of 153. With a land area of , it had a population density of in 2016.
Castor River North is a local service district (LSD) that is governed by a committee responsible for the provision of certain services to the community. The chair of the LSD committee is Stanley Tatchell.