- Jews' Harp Court
- Jews' Synagogue, Church Row
- Jews' Synagogue, Duke Street
- Jews' Synagogue, Heneage Lane
- (St.) John Baptist, Chapel of
- (St.) John Colchester (Abbey of)
- (St.) John in the White Tower
- (St.) John Sacre
- (St.) John the Baptist
- (St.) John the Baptist, Walbrook
- (St.) John the Evangelist
- (St.) John Walbrook
- (St.) John Watling Street
- (St.) John Zachary
- (St.) John, Fraternity of
- John Baptist Court
- John Carpenter Street
- John de Vere's Yard
- John Street
- (St.) John's Alley
- (St.) John's Chapel in the Tower
- John's Court
- (St.) John's passage
- (St.) John's Street
- John's Court, East Smithfield
- John's Court, Somerset Street
- (St.) John's (Head
- (Thomas) Johnson's Key
- Johnson's Court
- Johnson's Yard
- Joiners' Hall
- Joiners' Hall Buildings
- Joiners' Rents
- Jones' Rents
- Jones' Yard
- (St.) Jonyscroft
- Joyners' Alley
- Joyners' Court
- Joyners' Hall
- Judaismo
- Judd's Almshouses
- Le Juesgardyn
- The Julian
- Juwerie Lane
- (St.) Katherine by Alegate
- (St.) Katherine Colchirche, Guild
- (St.) Katherine Coleman
- (St.) Katherine Coleman Churchyard
- (St.) Katherine Cree
- (St.) Katherine Cree Churchyard
- (St.) Katherine de Belyeters Lane
- (St.) Katherine Dock Entrance
- (St.) Katherine Docks
- (St.) Katherine Holy Trinity
- (St.) Katherine in the Churchyard of Holy Trinity
- The Katherine Wheel, East Smithfield
- Katherine Buildings
- Katherine Court, Seething Lane
- Katherine Court, Throgmorton Street
- Katherine Well Alley
- The Katherine Wheel, Aldersgate Street
- The Katherine Wheel, Newgate Street
- Katherine Wheel Alley, Bishopsgate
- Katherine Wheel Alley, Snow Hill
- Katherine Wheel and George Alley
- Katherine Wheel Inn
- Katherine Wheel Inn, Bishopsgate
- Katherine Wheel Yard, Chick Lane
- (St.) Katherine's
- (St.) Katherine's Churchyard, East Smithfield
- (St.) Katherine's Cloysters
- (St.) Katherine's Court, East Smithfield
- (St.) Katherine's East Smithfield
- (St.) Katherine's Hospital
- (St.) Katherine's Lane
- (St.) Katherine's New Court
- (St.) Katherine's Pool
- (St.) Katherine's Precinct
- (St.) Katherine's Rents
- (St.) Katherine's Square, East Smithfield
- (St.) Katherine's Stairs, East Smithfield
- (St.) Katherine's Street, East Smithfield
- (St.) Katherine's Wharf, East Smithfield
- Katones Lane
- Kayum Fractum
- Kebb's Yard
- Kelles Alley
- Kennan's Hotel
- Kennet Wharf
- Kennet's Wharf Lane
- Kenton Street
- Kery Lane
- Ketton Street
- Le Key
- Key Court
- Kiffits' Court, St Michael's Lane
- King and Key Coach Office
- King Edward Street
- King Henry Yard
- King Street