| 2025 Tiburon Challenger | |
|---|---|
| Date | 29 September – 5 October |
| Edition | 17th |
| Surface | Hard |
| Location | Tiburon, United States |
| 2024 Champions | |
| Singles | |
 Nishesh Basavareddy | |
| Doubles | |
 Luke Saville / Tristan Schoolkate | |
The 2025 Tiburon Challenger was a professional tennis tournament played on outdoor hardcourts. It was the 17th edition of the tournament which was part of the 2025 ATP Challenger Tour. It took place in Tiburon, United States between September 29 and October 5, 2025.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 AUT | Jurij Rodionov | 156 | 1 |
| USA | Murphy Cassone | 174 | 2 |
 GBR | Jack Pinnington Jones | 178 | 3 |
 LBN | Benjamin Hassan | 195 | 4 |
 COL | Nicolás Mejía | 199 | 5 |
 KAZ | Dmitry Popko | 214 | 6 |
| USA | Michael Zheng | 227 | 7 |
| GBR | Johannus Monday | 228 | 8 |
The following players received wildcards into the singles main draw:
Samir Banerjee 
Duncan Chan Trevor Svajda The following player received entry into the singles main draw using a protected ranking:
The following player received entry into the singles main draw as a special exempt:
The following player received entry into the singles main draw through the Next Gen Accelerator programme:
The following player received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
vs. / vs. / 
