| Mariano Guerreiro | |
| Fullname: | Mariano Guerreiro |
| Birth Date: | 1993 1, df=yes |
| Birth Place: | La Carlota, Argentina |
| Position: | Centre forward |
| Currentclub: | UAI Urquiza |
| Youthyears1: | –2012 |
| Youthclubs1: | Argentinos Juniors |
| Years1: | 2012–2016 |
| Caps1: | 10 |
| Goals1: | 0 |
| Clubs1: | Argentinos Juniors |
| Years2: | 2013–2014 |
| Caps2: | 36 |
| Goals2: | 14 |
| Clubs2: | → Brown de Adrogué (loan) |
| Years3: | 2015 |
| Caps3: | 25 |
| Goals3: | 3 |
| Clubs3: | → Instituto ACC (loan) |
| Years4: | 2016 |
| Caps4: | 1 |
| Goals4: | 0 |
| Clubs4: | → Defensa y Justicia |
| Years5: | 2016–2017 |
| Caps5: | 28 |
| Goals5: | 4 |
| Clubs5: | Blooming |
| Years6: | 2017–2018 |
| Caps6: | 19 |
| Goals6: | 2 |
| Clubs6: | Guillermo Brown |
| Years7: | 2018–2019 |
| Caps7: | 4 |
| Goals7: | 0 |
| Clubs7: | Deportivo Santamarina |
| Years8: | 2019– |
| Caps8: | 12 |
| Goals8: | 1 |
| Clubs8: | UAI Urquiza |
| Club-Update: | 15 April 2019 |
Mariano Guerreiro (born 20 January 1993) is an Argentine footballer who plays as a centre forward for UAI Urquiza.