K
- K2 Sports - USA
- Kent - USA
- Kestrel USA - USA
- Kettler - Germany
- KHS - ROC and USA
- Kia - ROK, no longer produces bicycles
- Kinesis Industry - Taiwan and USA, Kenesis produces its own bikes as well as brands manufactured by Kinesis include Diamondback, Felt Bicycles, GT Bicycles, Schwinn, Jamis, K2, Raleigh, Trek, and Kona
- Klein - USA (Discontinued brand owned by Trek)
- Kogswell Cycles - USA
- Kona - USA
- Kronan - Sweden
- Kross - Poland
- KTM - Austria
- Kuota - Italy
- Kuwahara - Japan (Okinawa), is/was a private label bike manufacturer
Read more about this topic: List Of Bicycle Brands And Manufacturing Companies