Unless you are extremely lucky, these records are scarce. Civil registration did not begin in Ontario until 1869, so you would be looking for a church record and most have not survived. There are District Marriage records which were submitted by the various ministers of the time, but they only represent a small proportion of the marriages which took place. In that time frame, it would have been part of the Home District, and they are part of Ancestry.ca's marriage collection, and your couple do not show up.
