- Lacombe Court Northwest
- Lago Lindo Crescent Northwest
- Lakewood Road East Northwest
- Lakewood Road North Northwest
- Lakewood Road South Northwest
- Lakewood Road West Northwest
- Lakewood Village Northwest
- Lamb Crescent Northwest
- Lambert Court Northwest
- Lancaster Terrace Northwest
- Lansdowne Drive Northwest
- Latta Court Northwest
- Latta Crescent Northwest
- Latta Place Northwest
- Lauber Crescent Northwest
- Lauder Avenue Northwest
- Lauderdale Road Northwest
- Laurier Drive Northwest
- Laurier Place Northwest
- Lawrence Court Northwest
- Layton Court Northwest
- Lee Ridge Road Northwest
- Leger Boulevard Northwest
- Leger Court Northwest
- Leger Gate Northwest
- Leger Northwest Way
- Leger Road Northwest
- Leger Way Northwest
- Leigh Crescent Northwest
- Lemieux Close Northwest
- Lemieux Court Northwest
- Lemieux Place Northwest
- Lessard Drive Northwest
- Lessard Road Northwest
- Lewis Estates Boulevard Northwest
- Lewis Greens Drive Northwest
- Lewis Greens Northwest Drive
- Lincoln Crescent Northwest
- Lindsay Crescent Northwest
- Livingstone Court Northwest
- Loewen Court Northwest
- Londonderry Mall Northwest
- Londonderry Square Northwest
- Lorelei Close Northwest
- Lougheed Court Northwest
- Lynnwood Way Northwest