K5
- 5K (disambiguation)
- AMD K5
- Chevrolet K5 Blazer
- Daewoo Precision Industries K5
- GSR Class K5
- Gasherbrum I
- Ibanez K5
- K-5 (Kansas highway)
- K-5 (SLBM)
- K-5 (education)
- K5 (band)
- K5 Global
- K5 Plan
- KHII-TV
- KHNL
- KING-TV
- KKKKK (disambiguation)
- Kaliningrad K-5
- Kerberos protocol
- Kia Optima
- Kinner K-5
- Knightscope
- Krupp K5
- Kuratowski's theorem
- LNER Class K5
- PRR K5
- Pentax K-5
- Wings of Alaska