| 2006 Croatia Open Umag | |
|---|---|
| Date | 24–30 July |
| Edition | 17th |
| Category | International Series |
| Draw | 32S / 16D |
| Prize money | $375,000 |
| Surface | Clay / outdoor |
| Location | Umag, Croatia |
| Champions | |
| Singles | |
 Stan Wawrinka[1] | |
| Doubles | |
 Jaroslav Levinský / David Škoch[2] | |
The 2006 Croatia Open Umag was the 17th edition of the Croatia Open Umag men's tennis tournament. The tournament was held on outdoor clay courts from 24 July until 30 July 2006. Guillermo Coria was the defending champion but lost in the first round. Unseeded Stan Wawrinka won his first title of his career after Novak Djokovic retired with breathing problems in the tiebreak of the first set.
- ^ "2006 Umag – Singles draw". Association of Tennis Professionals (ATP).
- ^ "2006 Umag – Doubles draw". Association of Tennis Professionals (ATP).