The St. Louis Gateway Film Critics Association Award for Best Screenplay is one the annual film awards given by the St. Louis Gateway Film Critics Association.
| Year | Winner | Writer(s) | Source |
|---|---|---|---|
| 2004 | Sideways | Alexander Payne and Jim Taylor | novel by Rex Pickett |
| 2005 | Brokeback Mountain | Diana Ossana & Larry McMurtry | short story by Annie Proulx |
| 2006 | The Queen | Peter Morgan | — |
| 2007 | Juno | Diablo Cody | — |
| 2008 | Frost/Nixon | Peter Morgan | play by Peter Morgan |
| 2009 | (500) Days of Summer | Scott Neustadter & Michael H. Weber | — |
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