Locations
- Lady Anne Lane
- Lady's Lane
- Ladywell
- Lahandane
- Lambeth
- Lanarkshire
- Lancashire
- Lancaster
- Lanistown
- Lansdowne
- Lansdowne Crescent
- Lansdowne Place
- Lansdowne Road
- Lansdowne Terrace
- Laragh
- Larkfield
- Larne
- Larne Harbour
- Laurence Street
- Lavagh Villas
- Leadenhall Street
- Leahy's Terrace
- Lebuss Terrace
- Leeds
- Leenane
- Leeson Park
- Leeson Park Avenue
- Leeson Park House
- Leeson Street Lower
- Leeson Street Upper
- Leicester
- Leicester Avenue
- Leinster Avenue
- Leinster Place
- Leinster Road
- Leinster Road West
- Leinster Street
- Leinster Street North
- Leith
- Leitrim
- Leixlip
- Leland Place
- Lemon Street
- Lennox Lane
- Lennox Street
- Leo Avenue
- Leo Street
- Leonard Place
- Letterkenny
- Levere Terrace
- Leysin
- Liberty Hall
- Liffey Street Lower
- Liffey Street Upper
- Lilford Road
- Lime Yard
- Limehouse
- Limerick
- Lincoln
- Lincoln Place
- Lindsay Road
- Linenhall
- Linenhall Barracks
- Linenhall Street
- Linthorpe
- Lion Hill
- Lisburn
- Lisburn Road
- Liscard
- Lismacaffrey
- Lismore Terrace
- Lisnageer
- Lisryan
- Lissadare
- Lissan
- Listowel
- Little Britain Street
- Little Johnstown
- Liverpool
- Liverpool Road
- Livesey Street
- Lixnaw
- Lloyds Avenue
- Llwyn Celyn
- Lobinstown
- Locksley Street
- Lombard Street
- Lombard Street East
- London
- Londonbridge Road
- Long's Place
- Longford
- Longford Place
- Longford Street Great
- Longford Terrace
- Longwood
- Longwood Avenue
- Lord Edward Street
- Lord Nelson Street
- Lota Beg
- Lough
- Loughmore
- Loughnavalley
- Loughrea
- Louth
- Lower Clapton Road
- Lowton
- Lucan
- Ludgate Circus
- Luke Street
- Lullymore Terrace
- Lurgan
- Lurgan Street
- Lurgangreen
- Lusk
- Luttrellstown
- Lyndhurst Road