The very last line in the film is yelled by writer/director Kevin Smith.
The songs sang by Pastor Abin Cooper in the film were suggested by Michael Parks. Early in career he was also a country singer. The songs act as the only score in the film.
First feature film Kevin Smith shot using all digital cameras. RED cameras were primarily used and Canon 7D hand helds were used as B-Cameras
Filming on Red State began on September 21st, 2010. Smith edited the film while shooting the movie and was able to show the finished film to the cast and crew at the film's wrap party on October 29th.
Samuel L. Jackson was considered for the role that John Goodman was cast in.
Ralph Garman's character Caleb had spoken lines in the script but Garman thought the character would be more foreboding if he didn't speak, so Smith cut the lines. Garman's character was given a scar on his throat to act as an explanation for his muteness.
During a podcast Smith says he wrote the script in three days.
This is Kevin Smith's first film that isn't a comedy.