Trinity Presbyterian Church, Hamilton is the result of the merger between: Eastmount Presbyterian and St. Enoch Presbyterian Churches. Both the parental Churches have been strong Christian faith communities for decades in Hamilton, Ontario, Canada.

St. Enoch Presbyterian Church (Hamilton, Ontario) was formed July 12, 1925 by the Presbyterian minority of what later became the Laidlaw United Church.

In 1925 about 70 percent of the Presbyterian congregations in Canada – at the time the largest Protestant denomination – merged with the second largest protestant denomination, the Methodist Church and the Congregational Union of Canada (a numerically less significant but historically extremely important stream in evangelical Protestantism) to form the United Church of Canada, on June 10, 1925. (Read: The Non-concurring Presbyterians)

The non-concurring Presbyterians of St. Enoch congregation met in a number of halls before construction began on a new church in 1929. The church was dedicated April 13, 1930. The first minister was the Rev. W. G. Blake who served from 1925 to 1934. A new wing was added to the church building in 1956. St. Enoch's congregation remained in the Presbyterian Church.

Eastmount Presbyterian Church, (Hamilton, Ont.) was established in 1954 as an extension charge and as a congregation in 1955. The congregation originally met in Highview School on Hamilton Mountain and then in Elmwood Baptist Church until they were able to obtain their own building. The first Kirk building (currently used as the church hall for functions) was completed in 1960 at the corner of East 42nd and 9th Avenue. The first minister was Rev. W. A. Smith, who was called in 1960 and served until 1962. The congregation became self-supporting in 1961. A new church building was completed in 1966.

During 2005 St. Enoch was into its 80th year of worship in downtown Hamilton. In March of this same year, Eastmount celebrated its 50th year on the Hamilton Mountain. These Churches bring together a strong commitment to Christianity and to the Presbyterian Church in Canada.

On April 1, 2005, Trinity Presbyterian Church was established through the amalgamation of the Eastmount and St. Enoch congregations. The Presbytery of Hamilton officially constituted the new congregation on April 3 and inducted the Rev. Dr. Philip Wilson as its first minister. Under the leadership of Dr. Wilson, this new congregation is being recognized as an exciting and vital Christian community ready to meet the challenges of the 21st century.

Trinity Presbyterian congregates at the former Eastmount Presbyterian Church building have engaged an ambitious renovation and addition to the building. With help from Thier + Curran Architects of Hamilton (TCA) they've redeveloped the surrounding land and existing buildings to create a modernly elegant, and comfortable place of worship. The new church building is handicap accessible, includes new bathrooms, new meeting and office rooms and a beautifully designed greeting foyer. TCA is also the lead architect for the new Hamilton Eduction Square, with McMaster University and the Hamilton Board of Education.