Holy Trinity Avonside is a heritage-listed Anglican church located in Linwood, Christchurch, New Zealand. It is registered as a "Historic Place - Category I" by the New Zealand Historic Places Trust. It was "damaged beyond the point of repair" in the February 2011 Christchurch earthquake.

The Parish of the Most Holy Trinity Avonside was established in 1855, with the first service held in the Rev. Charles Mackie's home "Stricklands". In 1857 a church building made of cob was consecrated. Architect Benjamin Mountfort, a parishioner, designed additions to the church including a bell tower and timber vestry in 1869. Around 1873, further Mountfort-designed additions included a stone chancel and transepts. In 1905 the original cob building was replaced by a stone nave designed by Mountfort's son Cyril J. Mountfort. In 1953-1954 the west end of the church was extended, removing the remaining pre-1870s part of the building.

The church received damage in the 2010 Canterbury earthquake. Repairs were under way when the February 2011 Christchurch earthquake struck, when the church building suffered major amage
including collapse of the chancel and most of the transepts. The church is "damaged beyond the point of repair". Workers repairing damage on the inside of the 1876 Mountfort-designed part of the church were having lunch outside when this part of the building collapsed.