- La Fargeville
- Labrador Mt.
- Lackawanna
- Lacona
- Lake Carmel
- Lake Erie Beach
- Lake George
- Lake Grove
- Lake Katrine
- Lake Luzerne
- Lake Mohegan
- Lake Pleasant
- Lake Ronkonkoma
- Lake Success
- Lakeland
- Lakeview
- Lakeview
- Lakeville
- Larchmont
- Latham
- Lattingtown
- Laurel
- Laurel Hollow
- Laurelton
- Laurens
- Le Roy
- Leeds
- Leicester
- Levittown
- Liberty
- Lido Beach
- Lime Lake
- Limestone
- Lincoln Park
- Lincolndale
- Lindenhurst
- Lindley
- Linwood
- Little Falls
- Little Neck
- Little Valley
- Liverpool
- Livingston Manor
- Livonia Center
- Lloyd Harbor
- Lockport
- Locust Valley
- Long Lake
- Lorenz Park
- Lorraine
- Lowville
- Lynbrook
- Lyncourt
- Lyndon
- Lyndonville
- Lyon Mountain
- Lyons
- Lyons Falls
