| Alejandro Gaete | |
| Fullname: | Alejandro Humberto Gaete Duarte |
| Birth Date: | 25 January 1986 |
| Birth Place: | Santiago, Chile |
| Height: | 1.79 m |
| Position: | Defender |
| Currentclub: | San Marcos de Arica |
| Clubnumber: | 22 |
| Youthyears1: | 2004–2006 |
| Youthclubs1: | Universidad Católica |
| Years1: | 2007 |
| Clubs1: | Ñublense |
| Caps1: | 2 |
| Goals1: | 0 |
| Years2: | 2007 |
| Clubs2: | Coquimbo Unido |
| Caps2: | 4 |
| Goals2: | 0 |
| Years3: | 2008 |
| Clubs3: | Deportes Ovalle |
| Caps3: | 39 |
| Goals3: | 2 |
| Years4: | 2009 |
| Clubs4: | Unión La Calera |
| Caps4: | 10 |
| Goals4: | 0 |
| Years5: | 2009–2014 |
| Clubs5: | U. de Concepción |
| Caps5: | 86 |
| Goals5: | 0 |
| Years6: | 2014 |
| Clubs6: | Everton |
| Caps6: | 6 |
| Goals6: | 0 |
| Years7: | 2015–2016 |
| Clubs7: | Deportes Concepción |
| Caps7: | 43 |
| Goals7: | 3 |
| Years8: | 2016–2017 |
| Clubs8: | Coquimbo Unido |
| Caps8: | 11 |
| Goals8: | 0 |
| Years9: | 2017– |
| Clubs9: | San Marcos de Arica |
| Caps9: | 37 |
| Goals9: | 1 |
| Pcupdate: | 8 November 2018 |
Alejandro Humberto Gaete Duarte (born 25 January 1986) is a Chilean footballer that currently plays for San Marcos de Arica in the Primera B.