- KADE, Stacey
- KADREY, Richard
- KAFTAN, Vylar
- KAGAN, Janet
- KAGANOV, Leonid
- KAHN, James
- KALFAŘ, Jaroslav
- KANE, Stacia
- KANTOR, Vladimir
- KARIKA, Jozef
- KARINTHY, Ferenc
- KARINTHY, Frigyes
- KARPYSHYN, Drew
- KATERLI, Nina
- KATSU, Alma
- KAY, Guy Gavriel
- KAZANCEV, Alexandr
- KEARNEY, Paul
- KEEBLE, Helen
- KEENE, Brian
- KEITH, Andrew
- KEITH, William H., Jr.
- KELLNER, Wolfgang
- KELLOCK, Rani
- KELLY, James Patrick
- KENNEDY, Jeffe
- KENNEDY, Leigh
- KENWORTHY, Christopher
- KERNAGHAN, Eileen
- KERR, Katharine
- KERR, P. B.
- KERR, Philip
- KERSH, Gerald
- KESSEL, John
- KEYES, Daniel
- KEYES, Greg
- KEYES, J. Gregory
- KIDD, A. F.
- KIDD, Virginia
- KIERNAN, Caitlín R.
- KILWORTH, Garry
- KIM, Isabel J.
- KING, J. Robert
- KING, Stephen
- KING, William
- KINGFISHER, T.
- KINGSBURY, Donald
- KINNEY, Benjamin C.
- KIPLING, Rudyard
- KIRBY, Jack
- KIRBY, Matthew J.
- KIRCHOFF, Mary
- KIRKPATRICK, Russell
- KISNER, James
- KISSICK, Lucy
- KLAGES, Ellen
- KLEIN, Gérard
- KLEIN, T. E. D.
- KLEINHEINCZ, Csilla
- KLING, Marc-Uwe
- KLOOS, Marko
- KLUNE, TJ
- KLUVANEC, Marián
- KNAAK, Richard A.
- KNIGHT, Damon
- KNIGHT, E. E.
- KNIGHT, Eric
- KNOCKER, Andy
- KOBER, Wolfram
- KOBLOVA, Irina (mylně též KNOBLOVA, Irina)
- KÖHLER, Wolfgang
- KOCH, Gini
- KOCHAŃSKI, Krzysztof
- KOJA, Kathe
- KOŁODZIEJCZAK, Tomasz
- KOLPAKOV, Alexandr
- KOLUPAJEV, Viktor
- KONISI, Gaku
- KONSTANTINOV, Jurij
- KOONTZ, Dean R.
- KORABELNIKOV, Oleg
- KORECKIJ, Danil
- KORNBLUTH, Cyril M.
- KORNĚV, Pavel
- KOSIK, Rafał
- KOSMATKA, Ted
- KOSSAKOWSKA, Maja Lidia
- KOSSAKOWSKI, Andrzej
- KOSTICK, Conor
- KOSTOVSKÝ, Dušan
- KOTZWINKLE, William E.
- KOWAL, Mary Robinette
- KOZAK, Magdalena
- KOZÁK, Radoslav
- KRAPIVIN, Vladislav
- KRAUSNICK, Michail
- KREIGHBAUM, Mark
- KRES, Feliks W.
- KRESS, Nancy
- KRESSEL, Matthew
- KRITZER, Naomi
- KROHN, Rolf
- KRZEPKOWSKI, Andrzej
- KUANG, R. F.
- KUBE-McDOWELL, Michael P.
- KUCZKA, Péter
- KUCZYŃSKI, Maciej
- KÜNSKEN, Derek
- KUPRIENKO, Edwin
- KUSHNER, Ellen
- KUTTNER, Henry
- KUZNĚCOV, Sergej
- KYME, Nick