There fifty churches in the City. Of these seven are no longer functioning and are either in ruins or only the tower survives.
Here is the list, a * indicates an ‘extinct’ church.
All Hallows by the Tower
All Hallows on the Wall
*Christ Church Greyfriars
City Temple
Holy Sepulchre
*St Alban
St Andrew by the Wardrobe
St Andrew Holborn
St Andrew Undershaft
St Anne and St Agnes
*St Augustine
St Bartholomew the Great
St Bartholomew the less
St Benet Paul’s Wharf
St Botolph without Aldersgate
St Botolph without Aldgate
St Botolph without Bishopsgate
St Bride’s
St Clement Eastcheap
*St Dunstan in the East
St Dunstan in the West
St Edmund, King and Martyr
St Ethelburga
St Giles Cripplegate
St Helen’s Bishopsgate
St James Garlickhythe
St Katherine Cree
St Lawrence Jewry
St Magnus the Martyr
St Margaret Lothbury
St Margaret Pattens
St Martin without Ludgate
St Mary Abchurch
*St Mary Aldermanbury
St Mary Aldermary
St Mary at Hill
St Mary le Bow
St Mary Moorfields
*St Mary Somerset
St Mary Woolnorth
St Michael Cornhill
St Michael Paternoster Royal
St Nicholas Cole Abbey
St Olave Hart Street
*St Olave Old Jewry
St Paul’s Cathedral
St Peter Cornhill
St Stephen Walbrook
St Vedast Foster
Temple
50 churches in total, 43 extant, 7 in ruins or repurposed.