- LABEN, Carrie
- LACKEY, Mercedes
- LAFFERTY, R. A.
- LAGIN, Lazar
- LAIDLAW, Marc
- LAINÉ, Sylvie
- LAKE, Jay
- LAMBERT, Christophe
- LAMSLEY, Terry
- LANAGAN, Margo
- LANDIS, Geoffrey A.
- LANG, Jeffrey
- LANGAN, John
- LANGAN, Ruth Ryan
- LANGE, John
- LANGFORD, David
- LANGMEAD, Oliver K.
- LANNES, Roberta
- LANSDALE, Joe R.
- LANSDALE, John L.
- LANZOTTI, Paolo
- LAPIN, Boris
- LARIONOVA, Olga
- LARSON, Rich
- LARSSEN, Thorleif
- LASOÑ-KOCHAÑSKA, Gra¿yna
- LAUMER, Keith
- LAURANCE, Alice
- LAURENT-ŠKRABALOVÁ, Viktória
- LAVROV, Jegor
- LAWHEAD, Stephen
- LAWRENCE, Mark
- LAWSON, Chris
- LAYMON, Richard
- LEACOCK, Stephen
- LEBBON, Tim
- LECKIE, Ann
- LEDBETTER, William
- LEE, Edward
- LEE, Fonda
- LEE, Gentry
- LEE, Mary Soon
- LEE, Mike
- LEE, Rand B.
- LEE, Tanith
- LEE, Yoon Ha
- LE GUIN, Ursula K.
- LECH, Piotr Witold
- LEIBER, Fritz
- LEINSTER, Murray
- LEISNER, William
- LEM, Stanis³aw
- LEMAN, Alfred
- LEMAN, Bob
- LENGYEL, Péter
- LENNON, John
- LÉOURIER, Christian
- LEPOVETSKY, Lisa
- LERNER, Edward M.
- LESSING, Doris
- LETHEM, Jonathan
- LEVEGHI, Riccardo
- LEVINE, David D.
- LEVINSON, Paul
- LEVY, Roger
- LEWANDOWSKI, Konrad T.
- LEWIS, C. S.
- LEWIS, D. F.
- LIBLING, Michael
- LIEBSCHER, Walt
- LIGHTNER, Lee
- LIGOTTI, Thomas
- LINAWEAVER, Brad
- LINDSKOLD, Jane
- LINDSTRÖM, Per
- LINK, Kelly
- LINZNER, Gordon
- LIOU Cch'-sin [=Liu Cixin]
- LIPARULO, Robert
- LITTLE, Bentley
- LIU, Ken
- LIVADNYJ, Andrej
- LLOYD, Tom
- LŒVENBRUCK, Henri
- LOGINOV, Svjatoslav V.
- LOMM, Alexandr
- LONG, Amelia Reynolds
- LONG, Frank Belknap
- LONG, Nathan
- LONGYEAR, Barry B.
- LORENZ, Peter
- LORING, E. Bertrand
- LORRAH, Jean
- LOS, Vladimir
- LOVECRAFT, Howard Phillips
- LOVEGROVE, James
- LOVIN, Roger R.
- LOWRY, Dan
- LUCENO, James
- LUKIN, Jevgenij
- LUKINA, Ljubov
- LUKJANÌNKO, Sergej
- LUKOÏJANOV, Isaj
- LUMLEY, Brian
- LUNDWALL, Sam J.
- LUPOFF, Richard A.
- LUSTBADER, Eric Van
- LVOV, D.
- LYNCH, Scott
- LYON, R. K.
- LYRIS, Sonia Orin
- £YSIAK, Waldemar