L
- Laconia
- La Crosse
- Lacy
- Ladoga
- Lafayette
- La Fontaine
- Lagrange
- Lagro
- Lake Bruce
- Lake Cicott
- Lake Dalecarlia
- Lake Eliza
- Lake Grange
- Lake Hart
- Lake Hills
- Lake James
- Lake Mill
- Lake Park
- Lakeside
- Lakeside Park
- Lakes of the Four Seasons
- Lake Station
- Laketon
- Lake View
- Lakeview Spring
- Lake Village
- Lakeville
- Lake Wood
- Lakewood Hills
- Lalimere
- Lamar
- Lamb
- Lamong
- Lancaster
- Lancaster
- Landersdale
- Landess
- Lanesville
- Langoons
- Laotto
- La Paz
- La Paz Junction
- Lapel
- Lapland
- La Porte
- Larimer Hill
- Larwill
- Laud
- Lauer
- Laughery Switch
- Laugheryville
- Laurel
- Lawrence
- Lawrenceburg
- Lawrenceport
- Lawrenceville
- Lawton
- Layton
- Leases Corner
- Leatherwood
- Leavenworth
- Lebanon
- Lee
- Leesburg
- Leesville
- Legendary Hills
- Leipsic
- Leisure
- Lena
- Lena Park
- Leo
- Leo-Cedarville
- Leonard Springs
- Leopold
- Leota
- Leroy
- Letters Ford
- Letts
- Lettsville
- Lewis
- Lewisburg
- Lewis Creek
- Lewiston
- Lewisville
- Lexington
- Liber
- Liberal
- Liberty
- Liberty Center
- Liberty Mills
- Liberty Park
- Libertyville
- Liggett
- Ligonier
- Lilly Dale
- Limedale
- Lincoln
- Lincoln City
- Lincoln Hills
- Lincolnville
- Linden
- Lindenwood
- Linkville
- Linn Grove
- Linnsburg
- Linton
- Linwood
- Lisbon
- Little Acre
- Little Charlie
- Little Point
- Littles
- Little Saint Louis
- Little York
- Liverpool
- Livonia
- Lizton
- Loafers Station
- Lochie
- Locke
- Lockport
- Locust Grove
- Lodi
- Logan
- Logan
- Logansport
- Log Cabin Crossroads
- Lomax
- London
- Lone Tree
- Long Beach
- Long Run
- Longwood Crossing
- Loogootee
- Lookout
- Lorane
- Loree
- Losantville
- Lost River
- Lottaville
- Lottick Corner
- Lotus
- Lovett
- Lowell
- Lowell
- Lucerne
- Luray
- Luther
- Luxhaven
- Lydick
- Lyford
- Lyles
- Lynn
- Lynnville
- Lyons
- Lyonsville