- K & R Replicas (UK, white metal)
- Kaden (Czech Republic, diecast and plastic)
- KB Scale Models (Switzerland, aluminium)
- Kehi (Germany, white metal)
- Keng Fai (China, diecast)
- Kess (Italy/China, resin)
- Kinsmart (China, diecast)
- Kit Car 43 (Spain, resin and diecast)
- KK Scale (Germany/China, resin and diecast)
- Kleinbahn (Austria, plastic)
- Kovap (Czech Republic, tin)
- Kyosho (Japan/China, diecast)