Lake Michigan Monster is a 2018 American adventure and comedy horror film written, produced and directed by Ryland Brickson Cole Tews. It stares Tews, Erick West, Beulah Peters, Daniel Long and Wayne Tews and centres on an eccentric alcoholic who assembles a team to track down and kill the titular monster to avenge the death of his father.

The film was developed by Tews and Mike Cheslik after a conversation on what would happen if a monster washed up on the shores of Lake Michigan. It was shot in black-and-white and influenced by British comedy group Monty Python, the earlier seasons of the The Simpsons, and the films of Guy Maddin. Its visual style was developed out of necessity in the low-budget and comedic style, as the only camera available only developed low-resolution footage. It was shot in Milwaukee and Muskegon, Michigan, over sixteen months.

Lake Michigan Monster premiered at the Milwaukee Film Festival on October 24 2018, and was screened extensively at various festivals during 2019, including the Beloit International Film Festival and Fantasia International Film Festival. The video distribution company Arrow Films purchased distribution rights, and released it via their channel and video on demand on August 3, 2020. It won multiple awards and nominations, and was generally praised for its homage to 1960s B movie humor, as well as its use of practical and special effects.