Within These Walls is a 1945 American drama film directed by H. Bruce Humberstone and written by Eugene Ling and Coles Trapnell.

The film stars Thomas Mitchell, Mary Anderson, Edward Ryan, Mark Stevens, B.S.

When a judge, Michael Howland, decries conditions at a state prison, the governor recommends he become the new warden.

While introducing a new no-tolerance discipline to the prisoners, Howland meets convicted embezzler Steve Purcell, whose good behavior while serving his sentence impresses the warden after a jailhouse incident.

His daughter, meantime, has fallen in love with Purcell, finding out he was innocent of his crime, taking the rap for his guilty brother.