The 2023 Geneva Open (sponsored by Gonet) was a men's tennis tournament played on outdoor clay courts.

It was the 20th edition of the Geneva Open and part of the ATP Tour 250 series of the 2023 ATP Tour.

It took place at the Tennis Club de Genève in Geneva, Switzerland, from 21 to 27 May 2023.

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