The Maryland Center for Fundamental Physics is hosting and co-sponsoring a workshop on Advances in Theoretical and Observational Cosmology, May 26-28, 2010. It will take place in the John S. Toll Physics Building. The flood of new observations and theoretical advances continues in the field of cosmology. This workshop aims to bring together a medium-sized group of researchers leading in these recent results, including advances in particle cosmology, theoretical and observational particle astrophysics, and observational cosmology at all wavelengths.