The 2011 Royal Bank of Scotland Challenger was a professional tennis tournament played on hard courts. It was the fifth edition of the tournament which was part of the 2011 ATP Challenger Tour. It took place in Tiburon, United States between October 10 and October 16, 2011.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Ryan Sweeting | 67 | 1 | ||
| Ivo Karlović | 76 | 2 | ||
| Sam Querrey | 120 | 3 | ||
| Bobby Reynolds | 121 | 4 | ||
 Canada | Vasek Pospisil | 129 | 5 | |
| Izak van der Merwe | 136 | 6 | ||
| Wayne Odesnik | 147 | 7 | ||
| Björn Phau | 149 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry as a special exempt into the singles main draw:
The following players received entry from the qualifying draw:
See main article: 2011 Royal Bank of Scotland Challenger – Singles. Ivo Karlović def. 
Sam Querrey, 6–7(2–7), 6–1, 6–4
See main article: 2011 Royal Bank of Scotland Challenger – Doubles. 
Carsten Ball / Chris Guccione def. Steve Johnson / Sam Querrey, 6–1, 5–7, [10–6]
