K
- Kalo
- Kalona
- Kammerer Trailer Court
- Kamrar
- Kanawha
- Kellerton
- Kelley
- Kellogg
- Kemper
- Kendallville
- Kenfield
- Kennebec
- Kennedy
- Kensett
- Kent
- Kentner
- Kenwood
- Keokuk
- Keomah
- Keomah Village
- Keosauqua
- Keota
- Kesley
- Keswick
- Keystone
- Key West
- Kidder
- Kilbourn
- Killduff
- Kimballton
- Kimze
- King
- Kingsley
- Kingston
- Kingston
- Kinross
- Kirkman
- Kirkville
- Kirkwood Estates
- Kiron
- Klemme
- Kline
- Klinger
- Klondike
- Kniecrim
- Knierim
- Knittel
- Knoke
- Knoxville
- Konigsmark
- Kossuth
- Koszta
- Krowlton