The church is located at the intersection of 39 Dufferin and Mackay at the southwest corner of the Rideau Hall estate.

MacKay's present minister is Reverend Peter Woods.

The church was founded in 1875 on land donated by William MacKinnon, grandson of Thomas McKay, and the founder of New Edinburgh and namesake of the church.

The Romanesque Revival style building was constructed from 1909-1910.

The building was given a Municipal designation under the Ontario Heritage Act, Section 29.