| Lucas Ruiz | |
| Fullname: | Lucas Ruiz Alonso |
| Birth Date: | 7 March 1996 |
| Birth Place: | Las Piedras, Uruguay |
| Currentclub: | Tivoli |
| Position: | Defender |
| Youthyears1: | –2014 |
| Youthclubs1: | River Plate |
| Years1: | 2014–2017 |
| Caps1: | 13 |
| Goals1: | 0 |
| Clubs1: | River Plate |
| Years2: | 2018–2021 |
| Clubs2: | Albion |
| Years3: | 2021 |
| Caps3: | 9 |
| Goals3: | 0 |
| Clubs3: | Villa Teresa |
| Years4: | 2021–2022 |
| Clubs4: | San Marco Servigliano |
| Years5: | 2022 |
| Caps5: | 12 |
| Goals5: | 0 |
| Clubs5: | Libertas |
| Years6: | 2022–2023 |
| Clubs6: | Castelfidardo |
| Years7: | 2023 |
| Caps7: | 9 |
| Goals7: | 1 |
| Clubs7: | Sammaurese |
| Years8: | 2023– |
| Caps8: | 5 |
| Goals8: | 0 |
| Clubs8: | Tivoli |
| Club-Update: | 6 January 2024 |
Lucas Ruiz Alonso (born 7 March 1996) is an Uruguayan footballer who plays for Italian Serie D club Tivoli.
Ruiz began his career in 2014 with River Plate Montevideo.