Holy Trinity Church, Mackay, Anglican church in Gordon Street, Mackay, Australia.

Holy Trinity Church is a masonry Anglican church at 39 Gordon Street, Mackay, designed in 1923 by Brisbane architect Lange Leopold Powell and built by A Stonage and Sons, completing in 1926. Its design is believed to follow the Mission Church of the Order of Saint John seen by Canon Reginald Halse in Bombay, suggesting a Spanish church style with open verandahs added for the northern climate. A Warriors' Chapel forms part of the building.

The current building is the third church erected on this site, following the collapse of the first in 1878 and destruction of the second by cyclone in 1918. Each rebuilding reflects the community's commitment to maintaining this place of worship through difficult times.

The Warriors' Chapel was built into the church at the request of Rector Canon Fortesque Leo Ash, commemorating parishioners who died in World War I. The church's design is thought to follow the Mission Church of the Order of Saint John, which Canon Reginald Halse saw in Bombay (now Mumbai). The parish hall and rectory joined the precinct in the late 1930s.

The building is easily visible from the public street and visitors can appreciate its exterior design and stonework from Gordon Street. Contact the church office for information about visiting times or attending services to ensure you arrive when the building is open.

The 1923 design by Lange Leopold Powell included an 82-foot bell tower and an east-side arcade, both dropped when the 1926 cost rose from an estimate of £10,800 to £14,315. The tower was never built, so the church visitors see is a reduced version of the plan.