| Club: | Colón |
| Season: | 2017–18 |
| Manager: | Eduardo Domínguez |
| Chairman: | José Nestor Viganatti |
| Stadium: | Estadio Brigadier General Estanislao López |
| League: | Primera División |
| League Result: | 7th |
| Cup1: | 2016–17 Copa Argentina |
| Cup1 Result: | Round of 32 |
| Cup2: | 2017–18 Copa Argentina |
| Cup2 Result: | Round of 64 |
| Cup3: | Copa Sudamericana |
| Cup3 Result: | First stage |
| League Topscorer: | Diego Vera (3) |
| Season Topscorer: | Diego Vera (3) |
| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
The 2017–18 season is Colón's 4th consecutive season in the top-flight of Argentine football. The season covers the period from 1 July 2017 to 30 June 2018.
.[1]
| Date | Pos. | Name | From | Fee | |
|---|---|---|---|---|---|
| 7 July 2017 | GK |  Gonzalo Marinelli | Huracán | Undisclosed | |
| 7 July 2017 | MF | Matías Fritzler | Huracán | Undisclosed | |
| 25 July 2017 | MF | Jonathan Galván | Aldosivi | Undisclosed[2] [3] | |
| 30 July 2017 | MF | Diego Morales | Tigre | Undisclosed |
| Date | Pos. | Name | To | Fee | |
|---|---|---|---|---|---|
| 1 July 2017 | MF | Diego Lagos | Released | ||
| 1 July 2017 | MF | Fidencio Oviedo | Guaraní | Undisclosed | |
| 1 July 2017 | GK | Jorge Broun | Ludogorets Razgrad | Undisclosed | |
| 1 July 2017 | DF | Raúl Iberbia | Released | ||
| 4 July 2017 | MF | Gerónimo Poblete |  Metz | Undisclosed | |
| 6 July 2017 | MF | Franco Mazurek | Panetolikos | Undisclosed | |
| 21 July 2017 | MF | Yamil Garnier | Sarmiento (J) | Undisclosed | |
| 25 July 2017 | DF | Pablo Cuevas | Sarmiento (R) | Undisclosed | |
| 9 August 2017 | MF | Franco Leys | Juventud Unida | Undisclosed | |
| 11 August 2017 | FW | Ismael Blanco | Atlético Tucumán | Undisclosed | |
| 17 August 2017 | GK | Jorge Carranza | Atlético de Rafaela | Undisclosed | |
| Date from | Date to | Pos. | Name | From | |
|---|---|---|---|---|---|
| 15 July 2017 | 30 June 2018 | MF | Marcelo Estigarribia | Deportivo Maldonado[4] | |
| 19 July 2017 | 30 June 2018 | DF | Gustavo Toledo | Independiente | |
| 21 August 2017 | 30 June 2018 | MF | Leonardo Heredia | Almirante Brown[5] |
| Date from | Date to | Pos. | Name | To | |
|---|---|---|---|---|---|
| 1 July 2017 | 30 June 2018 | FW | Gustavo Villarruel | San Martín | |
| 14 August 2017 | 30 June 2018 | MF | Juan Bauza | Juventud Unida |
See main article: article and 2017–18 Argentine Primera División.
See main article: article and 2016–17 Copa Argentina.
See main article: article and 2018 Copa Sudamericana.