The 1997 Croatia Open Umag was a men's tennis tournament played on outdoor clay courts in Umag, Croatia that was part of the World Series of the 1997 ATP Tour.

It was the eighth edition of the tournament and was held from 21 July until 27 July 1997.

Third-seeded Félix Mantilla won the singles title.

Félix Mantilla defeated Sergi Bruguera, 6–3, 7–5 Dinu Pescariu / Davide Sanguinetti defeated Dominik Hrbatý / Karol Kučera, 7–6, 6–4