Bryan Kobylarz
- Sy Kaback
- Pierre Kaffer
- Frank Kahlich
- Tomas Kaiser
- Tomas Kaiser
- Kyle Kaiser
- Ralf Kalaschek
- Cyril Kalbassi
- Rinus van Kalmthout
- Eckhart von Kalnein
- Gunter Kalsdorf
- Hans-Bernd Kamps
- Tony Kanaan
- Yu Kanamaru
- Jonny Kane
- Steven Kane
- Juha Kankkunen
- Masaki Kano
- Dick Kantrud
- Karl Kappler
- Sage Karam
- Nikolay Karamyshev
- Christoph Karger
- Hans-Hatto Karl
- Jerry Karl
- Narain Karthikeyan
- Bob Karvonen
- Ed Karvonen
- Tonis Kasemets
- Ron Kashnar
- Ed Kassold
- Ukyo Katayama
- Robert Kath
- Ian Kaufman
- Hanspeter Kaufmann
- Wolfgang Kaufmann
- Georg Kaufmann
- Christian Kautz
- Joey Kay
- Gerald Kay
- Hiroshi Kazato
- John Keath
- Rupert Keegan
- Pat Keeley
- Dick Keen
- Tex Keene
- Eddie Keizan
- Ralf Kelleners
- Al Keller
- Dalton Kellett
- Dave Kelley
- Joe Kelly
- Ken Gottschalk
- Cap Kennedy
- Beader Kennedy
- Vernon `Earl` Kennedy
- Tony Kennington
- Matt Kenseth
- Mel Kenyon
- Jim Keogh
- Robbie Kerr
- Phil Kerr
- Whitey Kerschner
- Shorty Kerschner
- Bob Keselowski
- Csaba Kesjar
- Loris Kessel
- Dwight Kessler
- Tim Kezman
- Allam Khodair
- Nicolas Kiesa
- Hawley Kight
- Walt Killinger
- Heinz Kilp
- Juddy Kilpatrick
- Charlie Kimball
- Tom Kimber-Smith
- William Kimberly
- Frank Kimmel
- Georg Kimpel
- Takeshi Kimura
- Jordan King
- Harry King
- Bob Kingsbury
- Leo Kinnunen
- Steve Kinser
- Marvin Kirchhofer
- Kyle Kirkwood
- Tamas Pal Kiss
- Stefan Kissling
- David Lau Ying Kit
- Ilkka Kivimaki
- Howard `Zip` Kizer
- Frank Klaas
- Danny Kladis
- Greg Klar
- Russ Klar
- Arno Klasen
- Horst Klauke
- Art Klein
- Michael Klein
- Paul Kleinschmidt
- Jutta Kleinschmidt
- H.-Joachim Klemm
- Hans Klenk
- Christian Klien
- Karl Kling
- Jens Klingmann
- Traudl Klink
- Dieter Klink
- Jorg Klinkhammer
- Rudiger Klos
- Mike Knappenberger
- Arnie Knepper
- Ray Knepper
- Jimmy Knight
- Dieter Knup
- Wataru Kobayakawa
- Kamui Kobayashi
- Bryan Kobylarz
- Trevor Kobylarz
- Ernie Koch
- Kochli
- Dave Koetzla
- Reinhard Kofler
- Otto Kolan
- Kristian Kolby
- Walter Komossa
- Helmut Konig
- Franz Konrad
- Richard Kopp
- Bob Korf
- Kevin Korjus
- Michael Korten
- Vyacheslav Kosenkov
- J. Koster
- Alfons Koster
- Tomas Kostka
- Freddy Kottulinsky
- Tony Kotze
- Earl Kouba
- Heikki Kovalainen
- Mikhail Kovalev
- Oscar Koveleski
- Mikhail Kozlovskiy
- Stan Kozlowski
- Dominik Kraihamer
- Josef Kral
- Andreas Kramer
- Michael Kramer
- Frank Kramer
- Michael Krankenberg
- Aleksandr Krasovskiy
- Peter Kreis
- Friedrich-Wilhelm Kretzer
- Toni Kreuzer
- Mathias Kristensen
- Tom Kristensen
- Peter Kroeber
- Michael Krohn
- Tracy Krohn
- Kevin Krohn
- Bob Krollage
- Mikhail Krov
- Michael Krumm
- Robert Kubica
- Jan Kubiсek
- Dave Kudrave
- Thomas Kuhn
- Patrick Kujala
- Yuji Kunimoto
- Keisuke Kunimoto
- Boris Kurbatov
- Kathy Kurtz
- Peter Kutemann
- Ken Kuthey
- Pentti Kuukkala
- Masami Kuwashima
- Aleksey Kuznetsov
- Daniil Kvyat
- Henry Kwong
- Ludvig Kyrge
- Erich Köhler
Race results
| Date | Circuit | Category | Entrant | Car | # | Grid | Pos | Status |
|---|