| 2017 Croatia Open Umag | |
|---|---|
| Date | 17–23 July |
| Edition | 28th |
| Category | ATP World Tour 250 |
| Draw | 28S / 16D |
| Prize money | €482,060 |
| Surface | Clay |
| Location | Umag, Croatia |
| Champions | |
| Singles | |
 Andrey Rublev | |
| Doubles | |
 Guillermo Durán / Andrés Molteni | |
The 2017 Croatia Open Umag (also known as the Plava Laguna Croatia Open Umag for sponsorship reasons) was a men's tennis tournament played on outdoor clay courts. It was the 28th edition of the Croatia Open, and part of the World Tour 250 Series tier of the 2017 ATP World Tour. It took place at the International Tennis Center in Umag, Croatia, from 17 July through 23 July 2017. Unseeded Andrey Rublev, who entered the main draw as a lucky loser, won the singles title.
