| Diego Monarriz | |
| Fullname: | Diego Oscar Monarriz |
| Birth Date: | 2 March 1968 |
| Birth Place: | Buenos Aires, Argentina |
| Position: | Midfielder |
| Currentclub: | Juventud de Las Piedras (manager) |
| Youthclubs1: | San Lorenzo |
| Years1: | 1987–1992 |
| Caps1: | 36 |
| Goals1: | 1 |
| Years2: | 1993 |
| Years3: | 1994 |
| Years4: | 1995 |
| Caps4: | 4 |
| Goals4: | 0 |
| Years5: | 1997–1998 |
| Caps5: | 16 |
| Goals5: | 2 |
| Totalcaps: | 56 |
| Totalgoals: | 3 |
| Manageryears1: | 2002–2005 |
| Managerclubs1: | San Lorenzo (youth) |
| Manageryears2: | 2005–2009 |
| Managerclubs2: | River Plate (youth) |
| Manageryears3: | 2011–2013 |
| Managerclubs3: | Vélez Sarsfield (youth) |
| Manageryears4: | 2014–2016 |
| Managerclubs4: | Rosario Central (assistant) |
| Manageryears5: | 2017 |
| Managerclubs5: | Tijuana (assistant) |
| Manageryears6: | 2018–2019 |
| Managerclubs6: | San Lorenzo (reserves) |
| Manageryears7: | 2018 |
| Managerclubs7: | San Lorenzo (interim) |
| Manageryears8: | 2019 |
| Managerclubs8: | San Lorenzo (interim) |
| Manageryears9: | 2019–2020 |
| Managerclubs9: | San Lorenzo |
| Manageryears10: | 2020–2021 |
| Managerclubs10: | San Lorenzo (reserves) |
| Manageryears11: | 2021–2022 |
| Managerclubs11: | San Lorenzo (assistant) |
| Manageryears12: | 2021 |
| Managerclubs12: | San Lorenzo (interim) |
| Manageryears13: | 2022 |
| Managerclubs13: | Rosario Central (assistant) |
| Manageryears14: | 2022 |
| Managerclubs14: | Aldosivi (assistant) |
| Manageryears15: | 2023 |
| Managerclubs15: | Atlético Mineiro (assistant) |
| Manageryears16: | 2024– |
| Managerclubs16: | Juventud de Las Piedras |
Diego Oscar Monarriz (born 2 March 1968) is an Argentine football manager and former player who played as a midfielder. He is the current manager of Juventud de Las Piedras.
Monarriz played for San Lorenzo, All Boys, Belgrano and El Porvenir in his home country, aside from a short period at South African side Orlando Pirates. After retiring, he worked as a youth coach before taking over San Lorenzo in an interim manner in 2018, after Claudio Biaggio resigned.
Monarriz returned to his previous role after the appointment of Jorge Almirón, but on 1 November 2019, he replaced Juan Antonio Pizzi as manager; initially an interim, he was later promoted to manager.[1] [2] He resigned on 22 February 2020,[3] and subsequently returned to the reserve squad.
In 2022, Monarriz was Leandro Somoza's assistant at Rosario Central and Aldosivi, before joining Eduardo Coudet's staff at Brazilian club Atlético Mineiro ahead of the 2023 season.