L
- Lackawack
- Lackawanna
- Lacona
- Ladentown
- Ladieton
- Lafarges Landing
- La Fargeville
- Lafayette Corners
- Lafayetteville
- Lagrange
- Lagrange
- Lagrangeville
- Laidlaw
- Lairdsville
- Lake
- Lake Bluff
- Lake Bonaparte
- Lake Carmel
- Lake Clear
- Lake Colby
- Lake Delta
- Lake Desolation
- Lake Erie Beach
- Lake George
- Lake Grove
- Lake Hill
- Lake Huntington
- Lake Katrine
- Lakeland
- Lake Lucille
- Lake Minnewaska
- Lake Mohegan
- Lakemont
- Lake Osiris Colony
- Lake Peekskill
- Lake Placid
- Lake Pleasant
- Lake Ronkonkoma
- Lakeside
- Lake Success
- Lake Sunnyside
- Lake Vanare
- Lakeview
- Lakeview
- Lake View
- Lake View Terrace
- Lakeville
- Lakewood
- Lamberton
- Lamont
- Lamson
- Lancaster
- Lanesville
- Langdon
- Langford
- Langton Corners
- Lansing
- Lapala
- Lapeer
- Laphams Mills
- Larchmont
- La Salle
- Latham
- Lathams Corners
- Lattingtown
- Lattintown
- Laughing Waters
- Laurel
- Laurel Hollow
- Laurelton
- Laurens
- Lava
- Lawrence
- Lawrenceville
- Lawtons
- Lawyersville
- Lebanon
- Lebanon
- Lebanon Springs
- Lee
- Lee
- Leeds
- Leedsville
- Leesville
- Lefferts Mill
- Lehigh
- Lehigh Valley Junction
- Leicester
- Leisher Mill
- Lenox
- Lenox Park
- Lent Hill
- Lentsville
- Leonardsville
- Leonta
- Leptondale
- Le Roy
- Lester
- Levant
- Levittown
- Lewbeach
- Lewisboro
- Lewis Corners
- Lewiston
- Lexington
- Liberty
- Libertypole
- Libertyville
- Lick Springs
- Lido Beach
- Liebhardt
- Lila
- Lima
- Lime Lake
- Limerock
- Limestone
- Limestreet
- Lincklaen
- Lincoln
- Lincolndale
- Lincoln Park
- Lindbergh Lawns
- Linden
- Lindenhurst
- Lindley
- Lindsley Corners
- Linlithgo
- Lisbon
- Lisle
- Lithgow
- Little Bow
- Little Britain
- Little Falls
- Little France
- Little Genesee
- Little Hollow
- Little Rapids
- Littlerest
- Little Rock City
- Little Valley
- Little York
- Little York
- Liverpool
- Livingston
- Livingston Manor
- Livonia
- Lloyd Harbor
- Lloydsville
- Loch Muller
- Loch Sheldrake
- Locke
- Lockpit
- Lockport
- Lockwood
- Locust Grove
- Locust Manor
- Locust Point
- Locust Valley
- Lodi
- Logan
- Logtown
- Lomala
- Lombard
- Lomond Shore
- Lomontville
- Lonelyville
- Long Beach
- Long Bridge
- Long Crossing
- Long Eddy
- Long Flat
- Long Lake
- Long View
- Longwood
- Loomis
- Loomis Corner
- Loon Lake
- Lordville
- Lorenz Park
- Loring Crossing
- Lorraine
- Lost Valley
- Lotville
- Loudonville
- Louisville
- Lounsberry
- Lowell
- Lower Beechwood
- Lower Corners
- Lower Melville
- Lower South Bay
- Lower Town Landing
- Lowes Corners
- Lowville
- Loyd
- Ludlowville
- Lummisville
- Lutheranville
- Luzerne
- Lycoming
- Lykers
- Lynbrook
- Lyncourt
- Lyndon
- Lyndonville
- Lyon Corner
- Lyon Mountain
- Lyons
- Lyons Corners
- Lyonsdale
- Lyons Falls
- Lysander New Community