Plummer Additional is a township and single tier municipality located in Algoma District in Northeastern Ontario, Canada. The township had a population of 757 in the 2021 Canadian census.
The township includes the communities of:
The town of Bruce Mines is wholly surrounded by, but politically independent of, the township; it was separated in 1903. However, the 2010 mayoral election in Bruce Mines was won by Gordon Post, a candidate who pledged to investigate the feasibility of reamalgamating the two municipalities.
Rydal Bank Church located at Rydal Bank within the township is a municipally designated heritage site.
In the 2021 Census of Population conducted by Statistics Canada, Plummer Additional 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 township is served by Highway 17 which traverses the south in an eastâÂÂwest orientation, and Highway 638, which travels the middle of the township in a northâÂÂsouth orientation.