| 2018 Argentina Open | |
|---|---|
| Date | 12–18 February |
| Edition | 21st |
| Category | ATP World Tour 250 series |
| Draw | 28S/16D |
| Prize money | $546,680 |
| Surface | clay |
| Location | Buenos Aires, Argentina |
| Champions | |
| Singles | |
 Dominic Thiem | |
| Doubles | |
 Andrés Molteni / Horacio Zeballos | |
The 2018 Argentina Open was a men's tennis tournament played on outdoor clay courts. It was the 21st edition of the ATP Buenos Aires event, and part of the ATP World Tour 250 series of the 2018 ATP World Tour. It took place in Buenos Aires, Argentina, from February 12 through 18, 2018.