The Great O'Malley is a 1937 American crime drama film directed by William Dieterle and starring Pat O'Brien, Sybil Jason, Humphrey Bogart, and Ann Sheridan.

James O'Malley (Pat O'Brien) is an overzealous, unforgiving officer who abides by the letter of the law and hands out citations for petty infractions.

He pulls over John Phillips (Humphrey Bogart) for a noisy muffler, delaying him long enough to cause him to be late for arriving at his new job that would help him to take care of his wife (Frieda Inescort) and crippled daughter, Barbara (Sybil Jason).

The store owner does not want to pay him what the items are worth, causing Phillips to become enraged, knocking the clerk down, and taking money from the cash register.

Barbara and O'Malley strike up a friendship, while he falls in love with her teacher, Judy Nolan (Ann Sheridan), whose disdain softens his disciplinarian attitude.