| 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 9 and 15 October 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:
Sebastian Fanselow
Christopher O'Connell 
Ruan Roelofse 
Jan Šátral The following players received entry as lucky losers:
Mackenzie McDonald def. Bradley Klahn 6–4, 6–2. Luke Bambridge / David O'Hare def. 
Akram El Sallaly / 
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