| Ernesto Mendonça | |
| Fullname: | Ernesto Vieira de Mendonça |
| Nationality: | Portuguese |
| Birth Date: | 1901 10, df=yes |
| Medaltemplates-Title: | Competition record |
| Medaltemplates: | |
| Show-Medals: | yes |
| Updated: | 18 March 2015 |
Ernesto Vieira de Mendonça (born 27 October 1901) was a sailor from Portugal, who represented his country at the 1928 Summer Olympics in Amsterdam, Netherlands and in the O-Jolle event at the 1936 Summer Olympics.[1]