The International Cancer Genome Consortium is a voluntary scientific organization that provides a forum for collaboration among the world's leading cancer and genomic researchers.

The ICGC, established in 2007, aimed to define the genomes of 25,000 primary untreated cancers (the 25K Initiative). The ICGC solved numerous data governance, ethical and logistical challenges to make global genomic data sharing for cancer possible, providing the international community with comprehensive genomic data for many cancer types.