- (St.) Mary Aldermannechurche
- (St.) Mary Aldermary
- (St.) Mary Aldermary Churchyard
- (St.) Mary at Hill
- (St.) Mary at Hill, Street
- (St.) Mary atte Bow, Fraternity of
- (St.) Mary atte Naxe
- (St.) Mary atte Stokke
- (St.) Mary Axe
- (St.) Mary Axe, Street
- (St.) Mary Axe Warehouses
- (St.) Mary Bethlehem
- (St.) Mary Bothaw
- (St.) Mary Botolfe
- (St.) Mary Buttolphe
- (St.) Mary Chapel
- (St.) Mary Colechurch
- (St.) Mary de Aldermygbure
- (St.) Mary de Arcubus
- (St.) Mary de Berkyngcherch, Chapel
- (St.) Mary de Berkyngcherch
- (St.) Mary de Coneyhope, Chapel of
- (St.) Mary de Cricherche, Chapel
- (St.) Mary de Crichirche, Fraternity of
- (St.) Mary de Newechirche
- (St.) Mary de Vaucherche
- (St.) Mary de Westcheping
- (St.) Mary Fenchurch
- (St.) Mary Hill
- (St.) Mary in Fleet Street
- (St.) Mary le Bow
- (St.) Mary le Bow School
- (St.) Mary le Quern
- (St.) Mary Lothbury
- (St.) Mary Magdalen at the Fishmarket, de la Fishstrete
- (St.) Mary Magdalen in Piscar', by Westpiscar
- (St.) Mary Magdalen of the Guildhall
- (St.) Mary Magdalen, Aldgate
- (St.) Mary Magdalen, Eldefisshestrete
- (St.) Mary Magdalen, Lamberdyshel
- (St.) Mary Magdalen, Milk Street
- (St.) Mary Magdalen, Old Fish Street
- (St.) Mary Matfellon
- (St.) Mary Mounthaunt Lane
- (St.) Mary Mounthaw
- (St.) Mary Mounthaw Churcbyard
- (St.) Mary of Graces, Abbey
- (St.) Mary of the Carmelite Friars
- (St.) Mary of the Piu
- (St.) Mary Olaf
- (St.) Mary Oldechurche
- (St.) Mary Pattens
- (St.) Mary Pellipar
- (St.) Mary Salutacion
- (St.) Mary Somerset
- (St.) Mary Spital
- (St.) Mary Staining
- (St.) Mary Street
- (St.) Mary towards the Tower
- (St.) Mary Upehulle
- (St.) Mary Wenlock
- (St.) Mary Whitechapel
- (St.) Mary within Cripplegate, Hospital of
- (St.) Mary Without Aldersgate
- (St.) Mary without Aldgate
- (St.) Mary without Bishopsgate, Hospital of
- (St.) Mary Wolmaricherch
- (St.) Mary Woolchurch
- (St.) Mary Woolnoth
- (St.) Mary, King's Chapel of
- (Sts.) Mary and Nicholas Chapel by the Tower of London
- Mary, Priorie of Elsing Spital
- (St.) Mary's Chapel in the New Churchyard near Smethefeld
- (St.) Mary's Chapel, Moorfields
- Masons' Alley
- Masons' Avenue
- Masons' Court
- Masons' Hall
- Massey's Court
- (St.) Matthew Friday Street
- (St.) Matthew Silver Street
- (St.) Matthew's Alley
- (St.) Matthew's Alley, Court
- (St.) Matthew's Buildings
- (St.) Matthew's Court
- La Maudelyne in Eldefihsstrete
- Maudlin's Rents
- Maul's Court
- May Square
- Mayden Alley, Aldersgate Street
- Mayden Lane
- Maydenhead Alley, Thames Street
- Maydys Hedde
- Mayegood Alley
- Mayors of London
- Maypole Alley
- Maypole Alley or Court
- McLean's Buildings
- Meal Market
- Meal Yard