In 1891 the Township of Plummer Additional was incorporated and included in what is now the Town of Bruce Mines. The Town of Bruce Mines was separated from the Township of Plummer Additional and incorporated in 1903. In 1968 the Township of Plummer was annexed to the Township of Plummer Additional and forms part of that municipality today.
The Township is situated within the Algoma District and nestled along the shores of Lake Huron. The Corporation of the Township of Plummer Additional offers its citizens and tourists close access to all the amenities found within the larger communities. Surrounded by fresh water inland lakes and deciduous forests, this area presents ample opportunities for winter or summer activities. Furthermore, the area is home to several species of wildlife, thereby enhancing it's natural beauty.
The decline in mining and forestry activities has resulted in tourism and agriculture as the prime component of the economic base for the Township. Currently, there are approximately 45 farms operating in the area. The Township of Plummer Additional remains committed to preserving it's rural heritage and maintaining this source of it's economic base. Due to it's rural nature, the Township depends on the Town of Bruce Mines and other urban centres for it's major commercial and community services.