| Nelson Cossio | |
| Fullname: | Nelson Orlando Cossio Riquelme |
| Birth Date: | 1966 6, df=y |
| Birth Place: | Santiago, Chile |
| Position: | Goalkeeper |
| Years1: | 1983–1992 |
| Clubs1: | Palestino |
| Years2: | 1987 |
| Clubs2: | → Soinca Bata (loan) |
| Years3: | 1988 |
| Clubs3: | → Deportes Antofagasta (loan) |
| Years4: | 1989–1990 |
| Clubs4: | → Soinca Bata (loan) |
| Years5: | 1993 |
| Clubs5: | Everton |
| Years6: | 1994–1996 |
| Clubs6: | Universidad de Chile |
| Years7: | 1996–1997 |
| Clubs7: | Audax Italiano |
| Years8: | 1998 |
| Clubs8: | Deportes Temuco |
| Years9: | 1999 |
| Clubs9: | Deportes Iquique |
| Years10: | 2000 |
| Clubs10: | Deportes Concepción |
| Years11: | 2001 |
| Clubs11: | Unión Española |
| Years12: | 2001 |
| Clubs12: | Deportes Arica |
| Years13: | 2002 |
| Clubs13: | Universidad Católica |
| Nationalyears1: | 1997 |
| Nationalteam1: | Chile |
| Nationalcaps1: | 4 |
| Nationalgoals1: | 0 |
| Manageryears1: | 2003–2004 |
| Managerclubs1: | Naval |
| Manageryears2: | 2005 |
| Managerclubs2: | O'Higgins |
| Manageryears3: | 2006–2008 |
| Managerclubs3: | Deportes Copiapó |
| Manageryears4: | 2008 |
| Managerclubs4: | Coquimbo Unido |
| Manageryears5: | 2009 |
| Managerclubs5: | Deportes Copiapó |
| Manageryears6: | 2010 |
| Managerclubs6: | Naval |
| Manageryears7: | 2010 |
| Managerclubs7: | Deportes Copiapó |
| Manageryears8: | 2011 |
| Managerclubs8: | Unión San Felipe |
| Manageryears9: | 2011 |
| Managerclubs9: | San Luis |
| Manageryears10: | 2011–2012 |
| Managerclubs10: | Unión San Felipe |
| Manageryears11: | 2012–2013 |
| Managerclubs11: | Lota Schwager |
| Manageryears12: | 2013–2014 |
| Managerclubs12: | Deportes Melipilla |
| Manageryears13: | 2014 |
| Managerclubs13: | San Luis |
| Manageryears14: | 2014 |
| Managerclubs14: | Lota Schwager |
| Manageryears15: | 2014–2016 |
| Managerclubs15: | Deportes Melipilla |
| Manageryears16: | 2016 |
| Managerclubs16: | Deportes Vallenar |
| Manageryears17: | 2017 |
| Managerclubs17: | Provincial Osorno |
| Manageryears18: | 2018 |
| Managerclubs18: | San Bernardo Unido |
| Manageryears19: | 2019 |
| Managerclubs19: | Aguará |
| Manageryears20: | 2023- |
| Managerclubs20: | Adriana Cousiño |
Nelson Orlando Cossio Riquelme (born 1966-06-14) is a retired football goalkeeper from Chile, who made his debut for the Chile national football team on 1997-01-04 in a friendly against Armenia. He obtained a total number of four caps during his professional career.