Jonah Hill said that Kids (1995), This Is England (2006), Ratcatcher (1999), and The Sandlot (1993) inspired him to make this film.
Before shooting, Jonah Hill got advice from Martin Scorsese and Ethan Coen on the filmmaking process.
In an interview, Jonah Hill admitted that he was afraid he would accused of being bigoted because of the repeated use of words like f*****t throughout the film and considered a shooting a scene where the kids debate over whether they should be using that kind of language. He showed the scene to producer Scott Rudin, who asked, "Would you guys have had this conversation back then?" When Jonah said no, Rudin said that the scene would be "more offensive to put that in the movie than to show it how it actually was." Rudin is gay.
After a test screening, the projectionist said to the filmmakers that it was so cool that they found a movie from the '90s that they were releasing.
According to Jonah Hill, the biggest influence in making the film was creating a reverse skate video where the skating is very minimal and it was all about the people connecting.
Cameo: Kids (1995) writer Harmony Korine as Debra's one night stand going in to the bathroom.
Michelle Williams was originally cast but dropped out due to scheduling conflicts and was replaced by Katherine Waterston.
The film premiered at TIFF (Toronto international Film Festival) in September 2018.
Jonah Hill left a production meeting for Mid90s to attend Kanye West's album release party in Wyoming.