- Lincoln Center
- Lincolnway Village
- Lindale Manor
- Linden
- Lineville
- Linn Grove
- Linn Junction
- Linwood
- Linwood
- Lisbon
- Liscomb
- Little Cedar
- Little Cody Island
- Little Cook Island
- Little Groves
- Little Rag Island
- Little Rock
- Little Sioux
- Little Soup Bone Island
- Little Turkey
- Little Turtle Island
- Littleport
- Littleton
- Livermore
- Loch Burns
- Lockman
- Lockridge
- Locust
- Logan
- Logansport