The 2024 Open de Oeiras II was a professional tennis tournament played on clay courts.

It was the 11th edition of the tournament which was part of the 2024 ATP Challenger Tour.

It took place in Oeiras, Portugal between 13 and 18 May 2024.

The following players received wildcards into the singles main draw: The following players received entry into the singles main draw as special exempts: The following players received entry from the qualifying draw: