This project provides the genome assembly of Heliconius antiochus, common name Antiochus longwing. The assembly is provided by the Wellcome Sanger Institute Tree of Life Programme (https: //www.sanger.ac.uk/programme/tree-of-life/). The data under this project are made available subject to the Tree of Life Open Data Release Policy (https: //www.darwintreeoflife.org/project-resources/).