The Killer Angels was adapted into the 1993 movie Gettysburg. Much of the dialogue in the movie comes directly from the book.
The Firefly science fiction television series was developed by Joss Whedon after reading The Killer Angels. Homage to Shaara's novel was paid in the series' final episode, "Objects in Space".
Singer-songwriter Steve Earle included a song on his 1999 bluegrass album, The Mountain, called "Dixieland", sung from the point of view of the character Buster Kilrain.
A stage adaptation by Karen Tarjan was originally produced at Lifeline Theatre in Chicago in 2004, and again in the Fall of 2013. The adaptation was subsequently produced at Anchorage Community Theatre, the Wayside Theatre in Virginia, the Heritage Theatre in Maryland, Mother Road Theatre in New Mexico, and Michigan Shakespeare Festival.
The Killer Angels was the title of the 2013 album by Swedish heavy metal artists Civil War, which included the song "Gettysburg", a song about the Battle of Gettysburg.
A second stage adaptation by Brian Newell, The Killer Angels, Soldiers of Gettysburg, opened May 5, 2017 at the Maverick Theater in Fullerton California.
