The Optica Design and Fabrication Congress 2023 will take place in Québec City Convention Centre, Québec City, Quebec, Canada from 4th June to 8th June 2023. The topics for this congress include the fabrication of optics by lasers, additive manufacturing of optical components, the latest freeform design tools for illumination optics design and fabrication, micro-optics and the fabrication and use of optics from new materials, including the use of metasurfaces and other flat optical component techniques in advanced optical systems.