The 15th Conference on Integer Programming and Combinatorial Optimization (IPCO XV) was held June 15-17, 2011 at the IBM Learning Center in Armonk, New York, USA (please note that the location has changed).

The IPCO conference is under the auspices of the Mathematical Optimization Society (formerly known as the Mathematical Programming Society). It is held every year, except for those years in which the 'International Symposium on Mathematical Programming' takes place. The conference is a forum for researchers and practitioners working on various aspects of integer programming and combinatorial optimization. The aim is to present recent developments in theory, computation, and applications in these areas.

IPCO 2011 is supported by