| Film/Program Title | Director | Year |
| O'RILEY'S LUCK | Barton, Charles | 1936 |
| THE OCTOBER MAN | Baker, Roy | 1947 |
| OF MICE AND MEN | Milestone, Lewis | 1940 |
| OH! SUSANNA | Kane, Joseph | 1937 |
| OH WHAT A LOVELY WAR (original play) | Littlewood, Joan | 1963 |
| OKLAHOMA! | Zinnemann, Fred | 1955 |
| THE OKLAHOMA KID | Cagney, James | 1939 |
| THE OLD DARK HOUSE | Castle, William | 1963 |
| OLD LADY OF THREADNEEDLE STREET | Curran, Peter | 1956 |
| AN OLD SPANISH CUSTOM | Brunel, Adrian | 1936 |
| OLIVER TWIST | Lean, David | 1948 |
| ON THE FIDDLE | Frankel, Cyril | 1961 |
| ONE EXCITING NIGHT | Griffith, D.W. | 1922 |
| ONE FRIGHTENED NIGHT | Cabanne, Christy | 1935 |
| ONE NIGHT WITH YOU | Young, Terence | 1948 |
| ONE ROMANTIC NIGHT | Stein, Paul L. | 1930 |
| ONE THIRD OF A NATION [a.k.a. The House of Shame] | Murphy, Dudley | 1939 |
| OPEN RANGE | Smith, Clifford S. | 1927 |
| OPERATION DIPLOMAT | Guillermin, John | 1953 |
| ORDERED TO LOVE (1960) | Klinger, Werner | 1963 |
| ORDET [Eng: The Word / Fr: Le Verbe] | Dreyer, Carl Theodor | 1955 |
| LES ORGUEILLEUX [The Proud and the Beautiful] (1953) | Allégret, Yves | 1956 |
| THE ORPHAN | Edwards, J. Gordon | 1920 |
| ORPHANS OF THE STORM | Griffith, D.W. | 1922 |
| ORPHEUS | Cocteau, Jean | 1949 |
| AN OSCAR FOR SIGNOR ROSSI | ||
| OTHELLO | Welles, Orson | 1955 |
| OUT OF THE FOG | Tully, Montgomery | 1962 |
| OUTCAST | Florey, Robert | 1937 |
| OUTCRY [Il Sole Sorge Ancora] | Vergano, Aldo | 1946 |
| OUTLAWS OF THE RIO GRANDE | Stewart, Peter | 1941 |
| OUTPOST IN MOROCCO | Florey, Robert | 1949 |
| THE OX-BOW INCIDENT | Wellman, William | 1943 |