| Óscar Ornelas Küchle | |
| Office: | Governor of Chihuahua |
| Term Start: | 4 October 1980 |
| Term End: | 19 September 1985 |
| Predecessor: | Manuel Bernardo Aguirre |
| Successor: | Saúl González Herrera |
| Order1: | Senator for Chihuahua |
| Term Start1: | 1 September 1976 |
| Term End1: | 1979 |
| Predecessor1: | Arnaldo Gutiérrez Hernández |
| Successor1: | Santiago Nieto Sandoval |
| Order2: | Municipal President of Chihuahua |
| Term Start2: | 10 October 1974 |
| Term End2: | 1976 |
| Predecessor2: | José Luis Caballero |
| Successor2: | Humberto Martínez Delgado |
| Birth Date: | 30 November 1919 |
| Birth Place: | Chihuahua, Chih., Mexico |
| Death Date: | 2000 |
| Party: | Institutional Revolutionary |
Óscar Ornelas Küchle (born Chihuahua, Chih., 30 November 1920 - died 2000) was a Mexican lawyer and politician and member of Institutional Revolutionary Party (PRI). He served as governor of Chihuahua from 1980 to 1985.
Óscar Ornelas was also a Magistrate (associate justice) of the Supreme Tribunal of Justice of the State of Chihuahua, Director of the Faculty of Law and Rector of the Autonomous University of Chihuahua (UACh). He also founded "El Colegio de Bachilleres[1] " at national level, the first campus its name: Oscar Ornelas, in his honor. In 1974, he was elected mayor of the city of Chihuahua. In 1980, he was elected to be the Governor of Chihuahua. In 1985, a conflict in the election for the Rector of the Autonomous University of Chihuahua degenerated in a political confrontation that occurred in which led to his downfall as governor. The following year, one of his main opponents was Fidel Velázquez Sánchez. Óscar Ornelas lost the support of his party and was forced to resign the governorship on 19 September 1985.
Recently the Library of the School of Law of the Autonomous University of Chihuahua was rebaptized with the name of "Óscar Ornelas Küchle"; he is, in fact, the only lawyer to have a commemorative plaque and statue on the University facilities.