John Johnson (1807 – 28 December 1878) was an English architect who specialised in religious buildings and churches in the Gothic style. He was regularly employed by the civil engineer Sir John Kelk to design the homes and public buildings he funded. Johnson is best known for his collaboration with Alfred Meeson on designs for Alexandra Palace in north London; his designs for the Church of St Edward the Confessor in Romford, Essex; and for the grade I listed St Mary's Church in Tidworth, Wiltshire, which was completed the year he died.
As a result of the land on which one of Johnson's churches – St Luke's Church, Euston Road – was sitting being purchased by the Midland Railway, the building was dismantled, moved to Wanstead in north-east London, and re-erected as a Congregational church. Johnson's participation in the work gave him the distinction of becoming one of a small number of architects to have undertaken such a move and subsequent reconstruction.
John Johnson was born in 1807; little is known of his life, but he enjoyed fishing, and was for ten years on the committee of the Thames Angling Preservation Society.
For some time in the 1860s, Johnson was based in Bury St Edmunds, Suffolk, and was once the district surveyor for the London Borough of East Hackney.
Johnson was a prolific designer of religious buildings and churches. In 1849 he was instructed to design the Church of St Edward the Confessor in Romford, Essex, and returned in 1864 to complete his second church in the town, St Andrew's, in what is in now the Waterloo Estate. In 1853 he took on the rebuilding of the parish church of All Saints in Beyton, Suffolk, which retained the medieval core and tower.