This is a list of postal codes for the province of Ontario in Canada with the prefix L.
- L0J - Kleinburg
- L1B - Bowmanville
- L1C - Bowmanville
- L1E - Bowmanville
- L1G - Oshawa
- L1H - Oshawa
- L1J - Oshawa
- L1K - Oshawa
- L1L - Oshawa
- L1M - Oshawa
- L1N - Oshawa
- L1P - Oshawa
- L1R - Oshawa
- L1S - Greater Toronto area
- L1T - Greater Toronto area
- L1V - Greater Toronto area
- L1W - Greater Toronto area
- L1X - Greater Toronto area
- L1Y - Greater Toronto area
- L1Z - Greater Toronto area
- L2E - Niagara Falls
- L2G - Niagara Falls
- L2H - Niagara Falls
- L2J - Niagara Falls
- L2M - St. Catharines
- L2N - St. Catharines
- L2P - St. Catharines
- L2R - St. Catharines
- L2S - St. Catharines
- L2T - St. Catharines
- L2V - St. Catharines
- L2W - St. Catharines
- L3A
- L3B - Welland
- L3C - Welland
- L3E
- L3G
- L3H
- L3J
- L3K
- L3L - Barrie
- L3M
- L3N
- L3P - Greater Toronto-Southcentral Ontario area
- L3R - Greater Toronto area
- L3S - Greater Toronto area
- L3T
- L3V
- L3X - Newmarket
- L3Y - Newmarket
- L4A
- L4B - Greater Toronto area
- L4C - Richmond Hill
- L4E - Greater Toronto area
- L4G
- L4H - West Woodbridge (West Vaughan)/North Claireville, Ontario
- L4J - Greater Toronto area
- L4K - Concord
- L4L - Woodbridge
- L4M - Barrie
- L4N - Barrie
- L4P
- L4R
- L4S - Greater Toronto area
- L4T - Greater Toronto area
- L4V - Greater Toronto area
- L4W - Greater Toronto area
- L4X - Greater Toronto area
- L4Y - Greater Toronto area
- L4Z - Greater Toronto area
- L5A - Greater Toronto area
- L5B - Greater Toronto area
- L5C - Greater Toronto area
- L5E - Greater Toronto area
- L5G - Greater Toronto area
- L5H - Greater Toronto area
- L5J - Greater Toronto area
- L5K - Greater Toronto area
- L5L - Greater Toronto area
- L5M - Greater Toronto area
- L5N - Greater Toronto area
- L5P - Greater Toronto area
- L5R - Greater Toronto area
- L5S - Greater Toronto area
- L5T - Greater Toronto area
- L5V - Greater Toronto area
- L5W - Greater Toronto area
- L6A - Maple, Ontario
- L6B - Greater Toronto area
- L6C - Greater Toronto area
- L6E - Greater Toronto area
- L6G
- L6H - Oakville
- L6J - Oakville
- L6K - Oakville
- L6L - Oakville
- L6M - Oakville
- L6N
- L6P - Greater Toronto area
- L6R - Greater Toronto area
- L6S - Greater Toronto area
- L6T - Greater Toronto area
- L6V - Greater Toronto area
- L6W - Greater Toronto area
- L6X - Greater Toronto area
- L6Y - Greater Toronto area
- L6Z - Greater Toronto area
- L7A - Greater Toronto area
- L7L - Burlington
- L7M - Burlington
- L7N - Burlington
- L7P - Burlington
- L7R - Burlington
- L7S - Burlington
- L7T - Burlington
- L8E - Hamilton
- L8G - Hamilton
- L8H - Hamilton
- L8J - Hamilton
- L8K - Hamilton
- L8L - Hamilton
- L8M - Hamilton
- L8N - Hamilton
- L8P - Hamilton
- L8R - Hamilton
- L8S - Hamilton
- L8T - Hamilton
- L8V - Hamilton
- L8W - Hamilton
- L9A - Hamilton
- L9B - Hamilton
- L9C - Hamilton
- L9J - Hamilton
- L9H - Hamilton
- L9K - Hamilton
- L9V - Orangeville
- L9W - Orangeville
See also: List of postal codes in Canada
