- La Motte
- La Porte City
- Lacona
- Ladora
- Lake City
- Lake Mills
- Lake Panorama
- Lake Park
- Lake View
- Lakeside
- Lakota
- Lambs Grove
- Lamoni
- Lamont
- Lanesboro
- Lansing
- Larchwood
- Larrabee
- Latimer
- Laurel
- Laurens
- Lawler
- Lawton
- Le Claire
- Le Grand
- Le Mars
- Le Roy
- Leando
- Ledyard
- Lehigh
- Leighton
- Leland
- Lenox
- Leon
- Lester
- Letts
- Lewis
- Libertyville
- Lidderdale
- Lime Springs
- Lincoln
- Linden
- Lineville
- Linn Grove
- Lisbon
- Liscomb
- Little Cedar
- Little Rock
- Little Sioux
- Littleport
- Livermore
- Lockridge
- Logan
- Lohrville
- Lone Rock
- Lone Tree
- Long Grove
- Lorimor
- Lost Nation
- Loveland
- Lovilia
- Low Moor
- Lowden
- Lu Verne
- Luana
- Lucas
- Luther
- Luxemburg
- Luzerne
- Lynnville
- Lytton
