Mr. District Attorney is a 1941 American comedy crime film directed by William Morgan and written by Karl Brown and Malcolm Stuart Boylan.

The film was based on the long running and popular radio series Mr. District Attorney.

It stars Dennis O'Keefe, Florence Rice, Peter Lorre, Stanley Ridges, Minor Watson and Charles Arnt.

A well-connected and well-educated young lawyer P. Cadwallader Jones gets an appointment as deputy district attorney through the influence of his uncle.

After embarrassing his superior in court, he is punished by being assigned a seemingly unsolvable cold case concerning a notorious embezzler who has been missing for four years.