- Kosse
- Kountze
- Kress
- Krugerville
- Krum
- Kristi Estates Number 1 Colonia
- K-Bar-J Estates Colonia
- K-Bar Ranch Colonia
- Kadane Corner
- Kaffir
- Kalgary
- Kamay
- Kamey
- Kamey Island
- Kanawha
- Kane
- Karen
- Karnack
- Karon
- Katemcy
- Katy Estates
- Katyland
- Kaufold Estates Number 1 Colonia
- Kay Bee Heights
- KC Estates
- Kearny
- Keechi
- Keefer
- Keeler
- Keelersville