"Probing Standard Model Symmetries with Ultracold Neutrons" The next generation of experiments utilizing ultracold neutrons (neutrons with speeds less than 7 m/s) stands poised to address a number of issues spanning the subfields of nuclear physics, particle physics, and cosmology. In this talk, I will outline highlights of the future program of low-energy precision electroweak physics with ultracold neutrons in the U.S., including the new U.S.-based search for the T-violating (or, CP-violating) neutron electric dipole moment. This new search, to be staged at the Spallation Neutron Source, is projected to achieve a two orders-of-magnitude improvement in sensitivity, and may prove to be complementary to direct searches for new TeV-scale physics at the highest-energy colliders.