L
- Neil LaBute
- Pär Lagerkvist (1891–1974) (Sweden)
- Jun Lana
- Jonathon Larson
- Stig Larsson (Sweden)
- Miklos Laszlo, (1903–1973)
- Else Lasker-Schüler
- Walter Learning (Canada)
- Robert Edwin Lee
- VB Leghorn (United States)
- Sue Lenier
- Jakob Michael Reinhold Lenz
- Gotthold Ephraim Lessing
- Reinhard Lettau
- Ira Levin
- Caleb Lewis
- Saunders Lewis
- Nell Leyshon
- David Lindsay-Abaire
- Margo Linnet (Canada/United States)
- Romulus Linney
- Kenneth Lonergan
- Stephen Lowe
- Craig Lucas
- Clare Boothe Luce (United States)
- Charles Ludlam
- Ken Ludwig
- Otto Ludwig
Read more about this topic: List Of Playwrights