The 2011 Caloundra International was a professional tennis tournament played on outdoor hard courts. It was part of the 2011 ATP Challenger Tour. It took place in Caloundra, Australia between 7 and 13 February 2011.
| Country | Player | Rank | Seed | |
|---|---|---|---|---|
| Marinko Matosevic | 142 | 1 | ||
 Czech Republic | Lukáš Rosol | 143 | 2 | |
 Italy | Paolo Lorenzi | 145 | 3 | |
| Carsten Ball | 159 | 4 | ||
| Grega Žemlja | 166 | 5 | ||
| Jan Hernych | 174 | 6 | ||
 Australia | Bernard Tomic | 182 | 7 | |
| Matthew Ebden | 201 | 8 |
The following players received wildcards into the singles main draw:
Matthew Barton James Duckworth James Lemke Benjamin MitchellThe following players received a special exempt into the main draw:
The following players received entry from the qualifying draw:
Dayne Kelly
Wu Di
Daniel YooSee main article: 2011 Caloundra International – Singles. 
Grega Žemlja def. Bernard Tomic, 7–6(4), 6–3
See main article: 2011 Caloundra International – Doubles. Matthew Ebden / Samuel Groth def. 
Pavol Červenák / Ivo Klec, 6–3, 3–6, [10–1]