Dark Delusion is a 1947 American drama film directed by Willis Goldbeck and starring James Craig, Lionel Barrymore, and Lucille Bremer.

Dr. Gillespie asks a young surgeon, Dr. Tommy Coalt, to go to the small town of Bayhurst to replace a local doctor while he is on assignment to the Occupation effort in post-World War II Europe.

There, Coalt is asked to sign mental-health commitment papers on a beautiful young socialite, Cynthia Grace.

Coalt thinks there is something amiss, and begins his own investigation.

According to MGM records, the movie was not a hit, earning $475,000 in the US and Canada and $243,000 elsewhere, making a loss to the studio of $448,000.