| Ernesto Montagne Sánchez | |
| Office: | Prime Minister of Peru |
| President: | Juan Velasco Alvarado |
| Term Start: | October 3, 1968 |
| Predecessor: | Miguel Mujica Gallo |
| Successor: | Luis Edgardo Mercado Jarrín |
| Term End: | January 31, 1973 |
| Birth Date: | 18 August 1916 |
| Birth Place: | Lima, Peru |
Ernesto Montagne Sánchez (August 18, 1916 - April 13, 1993) was a Peruvian politician who served as the Prime Minister of Peru from October 3, 1968, to January 31, 1973.[1] He was born on August 18, 1916, in Lima.[2]