- La Belle
- La Due
- La Forge
- La Grange
- La Monte
- La Plata
- La Russell
- La Salle
- Labadie
- LaBarque Creek
- Laclede
- Lacledes Landing
- Lacyville
- Ladd
- Laddonia
- Ladero
- Ladue
- Lafayette Square
- Laflin
- Lagonda
- Laguna Beach
- Lake
- Lake Annette
- Lake City
- Lake Creek
- Lake Forest Estates
- Lake Junction
- Lake Lafayette
- Lake Lotawana
- Lake Mykee Town