Isidoro Alonso

{{short description|Uruguayan rower}}

{{Use dmy dates|date=April 2020}}

{{Infobox sportsperson

| name = Isidoro Alonso

| full_name =

| image =

| caption =

| sport = Rowing

| birth_date = {{birth date|1896|9|15|df=yes}}

| birth_place = Montevideo, Uruguay

| death_date =

| death_place =

}}

Isidoro Alonso (born 15 September 1896, date of death unknown) was a Uruguayan rower. He competed in the men's coxed four at the 1936 Summer Olympics.{{cite Sports-Reference |url=https://www.sports-reference.com/olympics/athletes/al/isidoro-alonso-1.html |archive-url=https://web.archive.org/web/20200418104052/https://www.sports-reference.com/olympics/athletes/al/isidoro-alonso-1.html |url-status=dead |archive-date=18 April 2020 |title=Isidoro Alonso Olympic Results |accessdate=1 August 2018}}