- London Workhouse
- London Workhouse Yard
- Long Alley
- Long Entry
- Long Lane
- Long Shop in Cheap
- Long Walk
- Longe Alley
- Longe Entre
- Le Longe Entrie
- Longebrod
- Longentre
- Longespeyeshawe
- Longhorne's Alley
- Lonsdale Chambers
- Loom Alley
- Lord Lumley's House
- Lord Mayors of London
- The Lorimers
- Le Lorimerie
- Lorimers' Hall
- Lothbury
- Lothbury, Ward of
- Loueronelane
- Louse Hall
- Love Court
- Love Lane
- Love Lane, Aldermanbury
- Lovell's Court
- Lovell's Inn
- Lovel's Yard
- Lover's, Lovet's Court
- Love's Grove
- Lower Court
- Lower East Smithfield
- Lower Mews
- Lower Thames Street
- Loxon's Alley
- Left by Thomas Hinde, 1635, to the parson and churchwardens of the parish (End. Ch. St. Peter, 1903, p. 2).
- Loyd's Brewhouse
- Loyd's Yard
- Lucas Lane
- Lucca, Society of
- Ludgate
- Ludgate Arcade
- Ludgate Churchyard
- Ludgate Circus
- Ludgate Circus Buildings
- Ludgate Court
- Ludgate Gaol
- Ludgate Hill
- Ludgate Hill Station
- Ludgate Place
- Ludgate Square
- Ludgate Street
- Ludgate Ward
- Ludlane
- Lugg Yard, Bow Lane
- Lumley House
- Lund's Alley
- Lusting Company
- Lutheran Church
- Luther's Buildings
- Lygon's Lodgings
- (The) Lyllye Potte
- Lymbarneres Lane, Lymbrenneres Lane
- Lyme Street
- Lyme Street Square
- Lyme Wharfe
- Lyon Alley
- Lyon in ye Wood Inn
- Lyon Key
- Lyon's Wharf
- Lyuerounelane
- Lyver Lane
- Mabsons
- Mac's Place
- Macworth Inn
- Maden Lane
- La Maderhawe
- Madock's Rents
- (St.) Magnus the Martyr
- Magnus Martirus Wharf
- Magpie Alley
- Magpie
- Magpy Alley
- Magpy
- Magpy Inn
- Magpy Yard, Bishopsgate
- Magpye
- Magpye Alley, Fenchurch Street
- Magpye Court
- Maid Court
- Maiden Court
- Maiden Lane
- The Maidenhead
- Maidenhead Alley
- Maidenhead Alley, Grub Street
- Maidenhead Alley, St. Katherine's
- Maidenhead Court