Trinity United Church represents one of the most unique structures erected for religious purposes in North Bay. It presents itself modestly, employing a mixture of forms borrowed from both Romanesque and Gothic styles in window arrangements. The width of the church and its side wall buttresses give it strength and a sense of stability in the community in which it stands.

Trinity was one of the earliest churches to be built in North Bay. It was constructed in 1906 and is located in the original downtown area. The end gable rose window, the large side tower and clerestory windows are some of the key features of this design. The new entry, constructed in 1964, has sensitively reflected the forms of gable ends on the original structure, while achieving greater emphasis on this important feature of the front elevation.

The three-dimensional form of this addition has assisted in overcoming the restricted area of the site, which forced the exterior walls of the original structure to be constructed on the street lines, thus precluding the benefit of a landscaped setting.

Initially of the Methodist persuasion, Trinity joined with the former Presbyterian congregation.