| Date: | 13–18 May |
| Edition: | 11th |
| Surface: | Clay |
| Location: | Oeiras, Portugal |
| Champs: | Jaime Faria |
| Champd: |  Anirudh Chandrasekar / Arjun Kadhe |
| Before Name: | Open de Oeiras |
| Before Year: | 2024 |
| Main Name: | Open de Oeiras |
| After Name: | Open de Oeiras |
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.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 United States | Alex Michelsen | 69 | 1 | |
| United States | Zachary Svajda | 122 | 2 | |
| United States | Emilio Nava | 124 | 3 | |
 Czech Republic | Vít Kopřiva | 127 | 4 | |
| Lloyd Harris | 128 | 5 | ||
 Argentina | Román Andrés Burruchaga | 149 | 6 | |
| United States | Patrick Kypson | 150 | 7 | |
 Japan | Shintaro Mochizuki | 157 | 8 |
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:
See main article: 2024 Open de Oeiras II – Singles.
Elias Ymer 3–6, 7–6(7–3), 6–4.See main article: 2024 Open de Oeiras II – Doubles.
Anirudh Chandrasekar / Arjun Kadhe def. Simon Freund / Johannes Ingildsen 7–5, 6–4.
