Since its inception in 1989 as AWOCA (Australasian Workshop on Combinatorial Algorithms), IWOCA has provided an annual forum for researchers who design algorithms for the myriad combinatorial problems that underlie computer applications in science, engineering and business. Previous IWOCA and AWOCA meetings have been held in Australia, Canada, Czech Republic, Finland, France, Germany, India, Indonesia, Italy, Japan, Singapore, South Korea, UK, Taiwan and USA.