- (St.) Margaret versus Turrim
- (St.) Margaret's Lane
- (St.) Marie at the Holle, Hupehulle
- Marine Square
- Mark Lane
- Mark Lane Station
- Markes Aley
- Market Buildings
- Market Passage
- (St.) Mark's Alley
- Marlow's Rents
- Marnersynne
- Marowe Key
- Marowlowes Key
- Marroys Key
- Mart Lane
- Marteley's Alley
- Marthe Lane
- Martilane
- (St.) Martin Baremannechurch, Bermancherche
- (St.) Martin by the Thames
- (St.) Martin Candlewick Street
- (St.) Martin Churchyard
- (St.) Martin de Garlekhuthe
- (St.) Martin in the Jewry
- (St.) Martin Ironmonger, Ismonger Lane
- (St.) Martin le Grand
- (St.) Martin le Grand, Street
- (St.) Martin Ludgate
- (St.) Martin Morgan
- (St.) Martin Orgar
- (St.) Martin Orgar Churchyard
- (St.) Martin Orgar Lane
- (St.) Martin Orgar Rectory
- (St.) Martin Outwich
- (St.) Martin Outwich, Churchyard
- (St.) Martin Pomary
- (St.) Martin Pomary Churchyard
- (St.) Martin Somerset
- (St.) Martin the Less
- (St.) Martin towards London Stone
- (St.) Martin Vintry
- Martin's Court
- (St.) Martin's Gate
- Martin's Lane
- (St.) Martin's le Grand Court
- (St.) Martin's Seld
- Martin's Chambers
- (St.) Mary Abchurch
- (St.) Mary Abchurch Chnrchyard
- (St.) Mary Abchurch, Lane of
- (St.) Mary Aldermanbary, Hospital
- (St.) Mary Aldermanbury
- (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