León Singer was born in Mexico City, Distrito Federal, Mexico. He was an actor and cinematographer. His son, Enrique Singer, became director of the National Theather Company in the Bellas Artes Institute in Mexico.
| Movie | A Day Without a Mexican | Lila's Dad | 2004-05-14 |
| Movie | The Journeyman | Lucio Buenstro | 2001-03-10 |
| Movie | If... Dog... Rabbit | Mr. Villalobos | 1999-09-29 |
| Movie | Selena | Concert Promoter | 1997-03-21 |
| Movie | Amistad | Don Pablo | 1997-12-10 |
| Movie | Mr. Jones | Hot Dog Vendor | 1993-10-08 |
| Series | Return to Lonesome Dove | Bolivar | 1993-11-14 |
| Movie | La Pastorela: The Shepherd's Tale | El Hermitano | 1991-12-23 |
| Movie | A Show of Force | Julio Dominguez | 1990-05-11 |
| Movie | Complot Petróleo: La cabeza de la hidra | 1981-01-01 | |
| Movie | Life Sentence | 1979-08-09 | |
| Movie | La vida difícil de una mujer fácil | 1979-01-18 | |
| Movie | The Perfect Woman | Psiquiatra | 1979-02-08 |
| Movie | Roots of Blood | Rogelio | 1979-05-30 |
| Movie | El viaje | 1977-06-28 | |
| Movie | La casta divina | Don Diego Rendón | 1977-11-17 |
| Movie | Once Upon a Scoundrel | 1973-01-01 | |
| Movie | The Mansion of Madness | 1973-08-10 | |
| Movie | One Way | Chevo | 1973-09-22 |
| Movie | El Cambio | Don Berna | 1971-03-19 |