| 2023 Fairfield Challenger | |
|---|---|
| Date | 9–15 October |
| Edition | 7th |
| Surface | Hard |
| Location | Fairfield, California, United States |
| Champions | |
| Singles | |
 Zachary Svajda | |
| Doubles | |
| Evan King / Reese Stalder | |
The 2023 Fairfield Challenger was a professional tennis tournament played on hard courts. It was the seventh edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Fairfield, California, United States between 9 October and 15 October 2023.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| USA | Alex Michelsen | 110 | 1 |
| USA | Nicolas Moreno de Alboran | 152 | 2 |
| USA | Denis Kudla | 165 | 3 |
| USA | Zachary Svajda | 170 | 4 |
 CAN | Alexis Galarneau | 174 | 5 |
 AUS | Adam Walton | 199 | 6 |
| USA | Tennys Sandgren | 204 | 7 |
 SUI | Alexander Ritschard | 209 | 8 |
The following players received wildcards into the singles main draw:
Ozan Baris Thai-Son Kwiatkowski Aidan MayoThe following players received entry into the singles main draw using protected rankings:
The following players received entry into the singles main draw as alternates:
Christian Langmo
Skander Mansouri The following players received entry from the qualifying draw:
Stefan Dostanic
August Holmgren Strong Kirchheimer Alfredo Perez Keegan Smith Learner Tien The following player received entry as a lucky loser:
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