| Mariano Suárez | |
| Order1: | 27th |
| Office1: | President of Ecuador |
| Term Start1: | 2 September 1947 |
| Term End1: | 16 September 1947 |
| Vicepresident1: | Carlos Julio Arosemena Tola |
| Predecessor1: | Carlos Mancheno Cajas |
| Successor1: | Carlos Julio Arosemena Tola |
| Office2: | Vice President of Ecuador |
| President2: | José María Velasco Ibarra |
| Term Start2: | 10 August 1946 |
| Term End2: | 23 August 1947 |
| Predecessor2: | Alfredo Baquerizo Moreno |
| Successor2: | Carlos Julio Arosemena Tola |
| Birth Date: | 8 June 1897 |
| Birth Place: | Otavalo, Ecuador |
| Death Place: | Quito, Ecuador |
| Party: | Conservative |
Mariano Suárez Veintimilla (8 June 1897 – 23 October 1980) was an Ecuadorian politician.
He was Minister of Finance from 1944 to 1945. He served as Velasco's Vice President from 1946 until he was ousted in 1947 by Carlos Mancheno Cajas.[1] Soon Mancheno was ousted and Suárez served briefly as President of Ecuador from 2 September 1947 to 16 September 1947.[2]