Summary
With a Wide Field Imager (WFI) delivering Hubble-like resolution over roughly 100 times the instantaneous area, and an observatory designed to enable large-area surveys nearly three orders of magnitude faster than HST, the Nancy Grace Roman Space Telescope will produce expansive surveys that transform our understanding of dark energy, dark matter, galaxies, and exoplanets. In order to help plan for and take full advantage of the Roman surveys, as well as test data reduction and analysis algorithms currently being developed, it is essential to create detailed simulated Roman photometric, morphological and spectroscopic datasets. The start of the community process of defining Roman's Core Community Surveys, preparations for launch in late 2026 and the expected release of the first public data in early 2027 make this a timely topic for discussion. This session will bring together observers and theorists to discuss and plan for simulations to maximize the scientific return from Roman’s Core Community and General Astrophysics surveys.