Tom Sawyer, Detective

Billy Cook Tom Sawyer

Donald O'Connor Huckleberry Finn

Porter Hall Uncle Silas Phelps

Phil Warren Jeff Rutledge

Janet Waldo Ruth Phelps

Elisabeth Risdon Aunt Sally Phelps

William Haade Jupiter Dunlap / Jake Dunlap

Edward Pawley Brace Dunlap

Clem Bevans Sheriff "Turkeyneck" Slocum

Raymond Hatton Judge Tyler

Howard M. Mitchell Elmer Hawkins, Prosecutor

Stanley Price Clayton

Harry Worth Dixon

Clara Blandick Aunt Polly

Si Jenks Farmer Sykes

Etta McDaniel Tulip

Oscar Smith Curfew

Monte Blue Sheriff Walker

Foy Van Dolsen Alex Cooper