- Old Horseshoe Wharf
- Old Jewry
- Old Jewry Chambers
- Old Lane
- Old Ludgate
- Old Navy Office
- Old Pipe Yard
- Old Piscaria
- Old Place
- Old Sergeants' Inn, Chancery Lane
- Old Shades Wharf
- Old South Sea House
- The Old Swan
- Old Swan Alley
- Old Swan Lane
- Old Swan Pier
- Old Swan Stairs
- Old Swan Wharf
- Old Temple
- Old Temple, Bar of
- Old Trinity House
- Old Victualling Office
- Old Wardrobe
- Old Watch House, Bishopsgate
- Old Wool Quay
- Old Yard
- Olde Hall
- Olde Swanne Alley
- Olivaunt
- Olive Court, St. Katherine's
- Oliver's Court
- Olvendebrigge
- One Swan Yard
- One Tun Yard
- Oram's Court
- Orance Court
- Ormond Place
- Le Osyer Yarde
- (St.) Osyth
- Owyn Win Newgate
- Oxenden Corner
- (Earl of) Oxford, Hostel of
- Oxford Armes Inn
- Oxford Arms Inn
- Oxford Arms Passage
- Oxford Arms, Oxford Arms Inn
- Oxford Court
- Oxford Court, Camomile Street
- Oxford Lane
- Oxford Place
- Oxford's Almshouses
- Oynters
- Oyster Gate
- Oyster Hulle
- Oystershell Court
- Packer Buildings
- Packer Court
- (Lady) Packlon Almshouses
- The Painted Seld
- Painted Tavern Lane
- Painters' Company
- Painters' Hall or Painter Stainers' Hall
- Pakkemanny's Wharf
- Pakyngton's Rentes
- Palace Court Office
- Palmereslane
- Palmersten Buildings
- Palmerston House
- (St.) Pancras, Soper Lane
- Pancras Alley
- Pancras Lane
- Panetaria
- Panyer Alley
- Paper Buildings
- Paper Street
- The Papey
- (Mr. Thos.) Papillon's House
- Papinger Alley
- Paradise
- Pardon Churchyard
- Pardon Churchyard, Smithfield
- Parish Chaplains
- Parish Clerks
- Parish Clerks' Hall
- Parish Priests
- Parishes
- Parkerislane
- Parker's Court
- Parker's Gardens
- Parker's Rents
- Parker's Yard
- (St.) Parnell
- Parrot Alley, Aldgate high Street
- Parson's Court
- Parsons' Court
- Parsons' Rents
- Parsons' Stairs
- Partridge Court
- Passage to the Hospital
- Passage to Wood Street