Raceteams - alphabetical overview: K
- K plus K Motorsport
- K&N Filters Racing
- K-Automotive Motorsports
- K-Hill Motorsports
- K-PAX Racing
- K2 Race Engineering
- K2R Motorsports
- Kadach Racing Team
- Kalliste
- Kaminsky Racing
- Kanaan Racing
- Karlsson Racing
- Katalogo Racing
- KCMG
- Kelleners Motorsport
- Kelley Racing
- Kelly Racing
- Kelly-Moss Motorsports
- Kemba Racing
- Ken Smith Motor Racing
- Kenn Hardley Racing
- KEO Racing
- Kern Motorsport
- Kessel Racing
- Kevin Davis Racing
- Kevin Miller Motorsport
- Keyed-Up Motorsports
- KFR Team
- KIC Motorsport
- Kid Jensen Racing
- Kinfaun Racing
- Kirk Shelmerdine Racing
- Kissling Motorsport
- Kiwi Team Nürburgring
- KK Motorsport
- KMP Racing
- Knapp Motorsports
- KnightHawk Racing
- Knüpfing Motorsport
- Kochanski Motorsport Project
- Kodewa
- Koiranen Motorsport
- Kolles & Heinz Union
- Kondo Racing
- Konrad Motorsport
- Kornely Motorsport
- Kosifler Team
- Kostecki Brothers Racing
- Kox Racing
- Kraft
- Kratingdaeng Racing Team
- Krauss Motorsport
- Kreider Motorsports
- Kremer Racing
- Krenek Motorsport
- Kristoffersson Motorsport
- KRK Racing
- Krohn Racing
- Krohn-Barbour Racing
- Kronos Racing
- KRS Motorsport
- KRT Racing
- Krumins
- Kruse Motorsport
- Kruse Schiller Motorsport
- Kryderacing
- KTF Sports
- KTR
- KTT Racing
- Kug Motorsport
- Kuhn Motorsport
- Kunimitsu / Mooncraft
- Kurt Ecke Motorsport
- KV Racing Technology
- Kyser Racing