| 2017 Fairfield Challenger | |
|---|---|
| Date | 9–15 October |
| Edition | 3rd |
| Surface | Hard |
| Location | Fairfield, California, United States |
| Champions | |
| Singles | |
 Mackenzie McDonald | |
| Doubles | |
 Luke Bambridge /  David O'Hare | |
The 2017 Fairfield Challenger was a professional tennis tournament played on hard courts. It was the third edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Fairfield, California, United States between October 9 and October 15, 2017.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| USA | Ernesto Escobedo | 93 | 1 |
| USA | Tennys Sandgren | 97 | 2 |
| USA | Bjorn Fratangelo | 117 | 3 |
 GER | Maximilian Marterer | 132 | 4 |
| GBR | |||
| USA | Stefan Kozlov | 144 | 6 |
 IND | Ramkumar Ramanathan | 149 | 7 |
 SRB | Nikola Milojević | 150 | 8 |
| USA | Michael Mmoh | 156 | 9 |
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw using a protected ranking:
The following players received entry into the singles main draw as special exempts:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Mackenzie McDonald def. Bradley Klahn 6–4, 6–2. Luke Bambridge / David O'Hare def. 
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