Sidney Poitier
Virgil Tibbs
Rod Steiger
Police Chief Bill Gillespie
Warren Oates
Deputy Sam Wood
Peter Whitney
Deputy Courtney
Lee Grant
Mrs. Leslie Colbert
Anthony James
Ralph
William Schallert
Mayor Schubert
Scott Wilson
Harvey Oberst
Larry Gates
Eric Endicott
James Patterson
Mr. Purdy
Quentin Dean
Delores Purdy
Kermit Murdock
Henderson
Larry D. Mann
Watkins
Matt Clark
Packy
Beah Richards
Mama Caleba
Arthur Malet
Ulam
Fred Stewart
Dr. Stuart
Timothy Scott
Shagbag
William Watson
McNeil
Eldon Quick
Charles Hawthorne
Jester Hairston
Endicott's Butler
Stuart Nisbet
Shuie
Khalil Bezaleel
Jess
Peter Masterson
Fryer
Phil Adams
1st Tough
Nikita Knatz
2nd Tough
Sam Reese
Clerk
Jack Teter
Philip Colbert (uncredited)
Alan Oppenheimer
Ted Appleton (uncredited)
Clegg Hoyt
Deputy (uncredited)
Buzz Barton
Conductor (uncredited)