The Library and Archives Canada site provides direct links to several Religious Archives, some of which are listed below. The Archives of Ontario provides their own list for Sources Of Religious Records In Ontario.
Look in Places & Institutions >> Churches & Religious Institutions for a list of some significant churches in the Kingston and Frontenac County areas.
Another name for the church is Mizpah United Church
Kingston/Frontenac, scroll down to Diocese of Ontario Archives.
Located at McMaster Divinity College
Tip: Kingston is in the Bay of Quinte conference, which also includes the presbyteries of Belleville, Cobourg, Lindsay, Oshawa, Peterborough and Renfrew.