The 2016 Croatia Open Umag (also known as the Konzum Croatia Open Umag for sponsorship reasons) was a men's tennis tournament played on outdoor clay courts. It was the 27th edition of the Croatia Open, and part of the ATP World Tour 250 Series of the 2016 ATP World Tour. It took place at the International Tennis Center in Umag, Croatia, from 18 July through 24 July 2016.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Pablo Cuevas | 24 | 1 | ||
| João Sousa | 30 | 2 | ||
 France | Jérémy Chardy | 34 | 3 | |
 Italy | Fabio Fognini | 36 | 4 | |
 Spain | Nicolás Almagro | 44 | 5 | |
| Spain | Pablo Carreño Busta | 46 | 6 | |
 Slovakia | Martin Kližan | 47 | 7 | |
 Czech Republic | Jiří Veselý | 50 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry as a special exempt:
| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 United Kingdom | Colin Fleming |  Poland | Mariusz Fyrstenberg | 112 | 1 | |
 United States | Nicholas Monroe |  New Zealand | Artem Sitak | 115 | 2 | |
| Slovakia | Andrej Martin | Hans Podlipnik-Castillo | 130 | 3 | ||
| Nikola Mektić | Antonio Šančić | 178 | 4 |
The following pairs received wildcards into the doubles main draw:
The following pair received entry as alternates:
See main article: 2016 Croatia Open Umag – Singles.
Fabio Fognini defeated Andrej Martin, 6–4, 6–1See main article: 2016 Croatia Open Umag – Doubles.
Martin Kližan / David Marrero defeated Nikola Mektić / Antonio Šančić, 6–4, 6–2
