The 2013 Napa Valley Challenger was a professional tennis tournament played on hard courts. It was the First edition of the tournament which was part of the 2013 ATP Challenger Tour. It took place in Napa, California, United States between 23 and 29 September 2013.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Denis Kudla | 95 | 1 | ||
| Tim Smyczek | 104 | 2 | ||
| Rhyne Williams | 125 | 3 | ||
| Alex Kuznetsov | 128 | 4 | ||
| Bradley Klahn | 133 | 5 | ||
 Australia | Matthew Ebden | 135 | 6 | |
| Steve Johnson | 142 | 7 | ||
| Donald Young | 143 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
See main article: 2013 Napa Valley Challenger – Singles.
Donald Young def. Matthew Ebden 4–6, 6–4, 6–2See main article: 2013 Napa Valley Challenger – Doubles.
Bobby Reynolds / John-Patrick Smith def. Steve Johnson / Tim Smyczek 6–4, 7-6(7-2)