- Louth
- Loughborough
- Lostwithiel
- Lossiemouth
- Longtown
- Longton
- Longsight
- Longridge
- Longniddry
- Longfield
- Longdendale
- Long Sutton
- Long Stratton
- Long Melford
- Long Lawford
- Long Eaton
- Long Crendon
- Long Buckby
- Long Ashton
- Londonderry County Borough
- Loftus
- Lofthouse
- Loddon
- Lockerbie
- Lochwinnoch
- Lochmaben
- Lochgilphead
- Lochgelly
- Locharbriggs
- Loanhead
- Llantwit Major
- Llantwit Fardre
- Llantrisant
- Llanrwst
- Llanidloes
- Llanharry
- Llanharan
- Llangollen
- Llangefni
- Llanfairpwllgwyngyll
- Llanfairfechan
- Llanelli
- Llandysul
- Llandybie
- Llandudno
- Llandrindod Wells
- Llandovery
- Llanbradach
- Livingston
- Liversedge
- Littleport
- Littlehampton
- Little Paxton
- Little Lever
- Little Eaton
- Little Clacton
- Little Chalfont
- Little Amwell
- Litherland
- Liss
- Lisnaskea
- Liskeard
- Lisburn
- Liphook
- Linthwaite
- Linlithgow
- Lingwood
- Lingfield
- Lincoln
- Limavady
- Lichfield
- Leysdown-on-Sea
- Leyland
- Lewes
- Leuchars
- Letchworth
- Lesmahagow
- Lerwick
- Leominster
- Lennoxtown
- Lenham
- Leiston
- Leighton Buzzard
- Leigh
- Leicester
- Leeswood
- Lee-on-the-Solent
- Leek
- Ledbury
- Leconfield
- Lechlade
- Leatherhead
- Law
- Laurencekirk
- Launceston
- Larne
- Larkhall
- Larkfield
- Largs
- Larbert
