The 2019 Swiss Open Gstaad (also known as the 2019 J. Safra Sarasin Swiss Open Gstaad for sponsorship reasons) was a men's tennis tournament played on outdoor clay courts.

It was the 52nd edition of the Swiss Open, and part of the ATP Tour 250 Series of the 2019 ATP Tour.

It took place at the Roy Emerson Arena in Gstaad, Switzerland, from 22 July through 29 July 2019.

[1] The following players received wildcards into the singles main draw: The following players received entry using a protected ranking into the main draw: The following players received entry from the qualifying draw: The following pairs received wildcards into the doubles main draw: