The 2014 Napa Valley Challenger was a professional tennis tournament played on hard courts. It was the second edition of the tournament which was part of the 2014 ATP Challenger Tour. It took place in Napa, California, United States, between 22 and 28 September 2014.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Sam Querrey | 52 | 1 | ||
| Tim Smyczek | 102 | 2 | ||
 Cyprus | Marcos Baghdatis | 107 | 3 | |
| Bradley Klahn | 118 | 4 | ||
 Canada | Peter Polansky | 122 | 5 | |
| Michael Russell | 124 | 6 | ||
| Denis Kudla | 125 | 7 | ||
| Canada | Frank Dancevic | 147 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
See main article: 2014 Napa Valley Challenger – Singles.
Sam Querrey def. Tim Smyczek, 6–3, 6–1See main article: 2014 Napa Valley Challenger – Doubles.
Peter Polansky / Adil Shamasdin def. Bradley Klahn / Tim Smyczek, 7–6(7–0), 6–1