Santiago Ontañón (1903-1989) was a Spanish set designer and playwright.
| Movie | Death Haunts Monica | 1976-01-02 | |
| Movie | No quiero perder la honra | 1975-05-05 | |
| Movie | Las señoritas de mala compañía | Don Faustino (uncredited) | 1973-12-17 | 
| Movie | Dust in the Sun | Le banquier (uncredited) | 1972-06-09 | 
| Movie | Blanca por fuera y Rosa por dentro | Don Félix | 1971-10-21 | 
| Movie | Crimen imperfecto | 1970-08-24 | |
| Movie | Marquis de Sade: Justine | 1969-04-03 | |
| Movie | De cuerpo presente | 1967-08-28 | |
| Movie | El Greco | Leoni | 1966-08-15 | 
| Movie | The Family and One More | 1965-09-10 | |
| Movie | Cotolay | Abad | 1965-01-01 | 
| Movie | Rueda de sospechosos | Don Pablo | 1964-06-16 | 
| Movie | The Black Tulip | 1964-02-28 | |
| Movie | Los dinamiteros | Conserje | 1964-11-02 | 
| Movie | The Adventures of Scaramouche | 1963-09-23 | |
| Movie | La gran familia | 1962-12-20 | |
| Movie | ¡Adiós, Mimí Pompón! | Bernardo Chamonix (uncredited) | 1961-02-21 | 
| Movie | Siempre es domingo | 1961-10-23 | |
| Movie | Julia y el celacanto | 1961-06-19 | |
| Movie | Amor bajo cero | Contraalmirante | 1960-09-01 | 
| Movie | Mi calle | 1960-11-21 | |
| Movie | For Men Only | 1960-09-08 | |
| Movie | Juego de niños | 1959-02-23 | |
| Movie | Miss Cuplé | 1959-09-17 | |
| Movie | Valentine's Day | Jugador de Golf | 1959-10-26 | 
| Movie | Muchachas en vacaciones | Tío Abelardo | 1958-06-23 | 
| Movie | Faustina | Don Fernando | 1957-05-13 | 
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