The St. Louis Gateway Film Critics Association Award for Best Screenplay is one of 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 and 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 and Michael H. Weber | — |
| Year | Winner | Writer(s) | Source |
|---|---|---|---|
| 2010 | The Social Network | Aaron Sorkin | The Accidental Billionaires by Ben Mezrich |
| 2011 | The Descendants | Alexander Payne, Nat Faxon, and Jim Rash | novel by Kaui Hart Hemmings |
| 2012 | Lincoln (tie) | Tony Kushner | Team of Rivals: The Political Genius of Abraham Lincoln by Doris Kearns Goodwin |
| Silver Linings Playbook (tie) | David O. Russell | novel by Matthew Quick | |
| 2013 | 12 Years a Slave | John Ridley | memoir by Solomon Northup |
| 2014 | Gone Girl | Gillian Flynn | novel by Gillian Flynn |
| 2015 | The Martian | Drew Goddard | novel by Andy Weir |
| 2016 | Love & Friendship | Whit Stillman | Lady Susan by Jane Austen |
| 2017 | The Disaster Artist | Scott Neustadter and Michael H. Weber | book by Greg Sestero and Tom Bissell |
| 2018 | BlacKkKlansman | Spike Lee, David Rabinowitz, Charlie Wachtel, and Kevin Willmott | The memoir Black Klansman by Ron Stallworth |
| 2019 | The Irishman | Steven Zaillian | I Heard You Paint Houses by Charles Brandt |
| Year | Winner | Writer(s) | Source |
|---|---|---|---|
| 2020 | I'm Thinking of Ending Things | Charlie Kaufman | novel by Iain Reid |
| 2021 | The Power of the Dog | Jane Campion | novel by Thomas Savage |
| 2022 | She Said | Rebecca Lenkiewicz | book by Jodi Kantor and Megan Twohey, and the New York Times investigation by Kantor, Twohey, and Rebecca Corbett |
| 2023 | Oppenheimer | Christopher Nolan | American Prometheus by Kai Bird and Martin J. Sherwin |