Holy Trinity, Hoxton is an Anglican church in the Hoxton district of the London Borough of Hackney. The church is notable not only for its distinctive tower and broach spire but also for its long adherence to 'High Church' doctrines and liturgical practices. In 1941 Holy Trinity merged with the parish of St Mary, Britannia Walk N1 after the latter was made unusable by WW2 aerial bombing.

The Grade-II listed building was completed in 1848 to the design of William Railton (1800–77), the designer of Nelson's Column. Railton's design for Holy Trinity is inspired by 13th-century English examples  and is constructed with Kentish Ragstone. The interior has tall, thin arcades on octagonal piers and whitened walls.

In 1896 the lowest portion of the tower was converted to a baptistry opening into the south-west corner of the church, to the design of Spencer W Grant (1879–1914).

Following WW2 aerial bombing in January 1941 that damaged the building the chancel area was reordered in 1942 under the supervision of Martin Travers (1886–1948), as follows:

A description of the church in 1947 adds:

There are two Holy Water Stoups, and there are shrines dedicated to the "Sacred Heart," "St. George," and "St. Joseph." Above a side altar there is an image of the Virgin and Child, the principal figure of the Virgin being adorned with an elaborate blue robe. At the back of the Church there is a Pieta and an altar for the offering of Requiem Masses for departed souls.

At the time when Holy Trinity suffered aerial-bomb damage, and by the same air-raid, the church of St Mary, Britannia Walk, Hoxton, was made entirely derelict. This church had inherited a number of historic items from the City church of St Mary Somerset Street (demolished 1871), specifically:

The current pipe organ of 1952 is by the firm of John Compton and is located on a west gallery. The previous organ by Bishop & Starr was located in the south chancel and removed following WW2 bomb damage.