L
- Lacelle
- Lacey
- Lacona
- Ladoga
- Ladora
- Lafayette
- Lainsville
- Lake City
- Lake Manawa
- Lake Mills
- Lake Park
- Lake Ridge Mobile Home Park
- Lakeside
- Lake View
- Lakeview Mobile Home Court
- Lakewood
- Lakewood Corner
- Lakonta
- Lakota
- Lambs Grove
- Lamoille
- Lamoni
- Lamont
- La Motte
- Lancaster
- Lanesboro
- Langdon
- Langworthy
- Lansing
- Lansrud
- Lanyon
- La Porte City
- Larchwood
- Larland
- Larrabee
- Last Chance
- Latimer
- Latty
- Laurel
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- Lavinia
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- Lawrenceburg
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- Lebanon
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- Lenox
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- Lester
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- Levey
- Lewis
- Lexington
- Liberty
- Liberty Center
- Libertyville
- Lidderdale
- Lime City
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- Linby
- Lincoln
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- Lindale Manor
- Linden
- Lindy
- Lineville
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- Linwood
- Linwood
- Lisbon
- Liscomb
- Little Cedar
- Little Groves
- Littleport
- Little Rock
- Little Sioux
- Littleton
- Little Turkey
- Livermore
- Lloyds Mobile Home Park
- Loch Burns
- Lockman
- Lockridge
- Locust
- Logan
- Logansport
- Lohrville
- Lone Rock
- Lone Tree
- Long Grove
- Long Point
- Lorah
- Lorimo
- Lorimor
- Loring
- Lost Canyon Mobile Home Park
- Lost Nation
- Lotts Creek
- Louisa
- Lourdes
- Loveland
- Lovilia
- Lowden
- Lowell
- Low Moor
- Luana
- Lucas
- Ludlow
- Lundgren
- Lunsford
- Luray
- Luther
- Luton
- Lu Verne
- Luxemburg
- Luzerne
- Lycurgus
- Lyman
- Lyndale
- Lynnville
- Lytton