- Leprouse
- Leslie
- Letha
- Lewiston
- Lewiston Orchards
- Lewisville
- Liberty
- Liberty
- Lidy Hot Springs
- Lifton
- Lightfoot
- Lignite
- Lincoln
- Linden
- Lindsayville
- Linfor
- Little Banks Island
- Little Island
- Little Rock
- Little Rocky Island
- Little Sugar Loaf
- Lone Pine
- Lone Rock
- Long Creek Summit Home
- Long Island
- Long Island
- Lorenzo
- Lost River
- Lost River
- Lotus