| Date: | 26 September – 04 October |
| Edition: | 9th |
| Draw: | 32S / 16D |
| Surface: | Hard |
| Prize Money: | $100,000 |
| Location: | Tiburon, United States |
| Champs: |  Tim Smyczek |
| Champd: |  Johan Brunström / Frederik Nielsen |
The 2015 Tiburon Challenger was a professional tennis tournament played on outdoor hard courts. It was the ninth edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Tiburon, United States between September 26 and October 4, 2015.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| United States | Denis Kudla | 76 | 1 | |
 United Kingdom | Kyle Edmund | 101 | 2 | |
| United States | Tim Smyczek | 106 | 3 | |
| Dustin Brown | 107 | 4 | ||
| United States | Ryan Harrison | 116 | 5 | |
| United States | Bjorn Fratangelo | 139 | 6 | |
| Blaž Rola | 139 | 7 | ||
| United States | Jared Donaldson | 143 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry into the singles main draw courtesy of a protected ranking:
The following players received entry into the singles main draw as a special exempt:
The following players received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
Dennis Nevolo Nicolas Meister Sekou BangouraSee main article: article and 2015 Tiburon Challenger – Singles.
Tim Smyczek def. Denis Kudla, 1–6, 6–1, 7–6(9–7).[1]See main article: article and 2015 Tiburon Challenger – Doubles.
Johan Brunström / Frederik Nielsen def. 
Carsten Ball / Matt Reid, 7–6(7–2), 6–2.