| Osvaldo Mércuri | |
| Office: | President of the Buenos Aires Province Chamber of Deputies |
| Term Start: | 7 December 2001 |
| Term End: | 10 December 2005 |
| Successor: | Ismael Pasaglia |
| Term Start2: | 8 December 1989 |
| Term End2: | 7 December 1997 |
| Predecessor2: | Luis Rodolfo Almar |
| Successor2: | Francisco José Ferro |
| Office3: | Provincial Deputy of Buenos Aires |
| Term Start3: | 10 December 1985 |
| Term End3: | 10 December 2005 |
| Constituency3: | Third Electoral Section |
| Birth Place: | Lomas de Zamora, Argentina |
| Death Place: | San Isidro, Buenos Aires Province, Argentina |
| Party: | Justicialist Party |
| Spouse: | Maria Elena |
Osvaldo Mércuri (1944/1945 – 6 February 2021) was an Argentine politician, based in Buenos Aires Province, and member of the Justicialist Party. He was a longtime member of the Buenos Aires Province Chamber of Deputies from 1985 to 2005.[1] This included two tenures as the President of the Buenos Aires Province Chamber of Deputies: 7 December 1989, to 8 December 1997, and again from 7 December 2001, until 10 December 2005.[2] Mércuri also chaired the national 1994 Constitutional Reform Convention and the Justicialist Party conference.[2]
Mércuri was born in Lomas de Zamora, Buenos Aires Province, Argentina.[2]
At the time of his death, Mércuri was serving as a member of the Mercosur Parliament (Parlasur).[1] His term in Parlasaur was scheduled to expire on 31 December 2021.[1]
Mércuri died from COVID-19 at a hospital in San Isidro, Buenos Aires Province, where he had been hospitalized for three weeks, on 6 February 2021, at the age of 76.[1] [2] He was survived by his wife, Maria Elena, and their children.[2] Former President of Argentina Eduardo Duhalde, a friend and close political ally, paid tribute to Mércuri on Twitter following his death.[2]