The 21st International Conference on Atomic Physics, ICAP 2008, will be held from July 27-August 1, 2008 in scenic New England, on the campus of the University of Connecticut, Storrs, Connecticut, USA. This ongoing series of conferences, held every even-numbered year since 1968, is devoted to fundamental studies of atoms, broadly defined. The previous conference was held in Innsbruck, Austria in July 2006. Talks will encompass forefront research in basic AMO physics, emphasizing atoms and their interactions with each other and with external fields. Historically, topics have included quantum electrodynamics, tests of basic symmetries (CPT), precision measurements (including atomic clocks and fundamental constants), laser spectroscopy, ultracold atoms and molecules, Bose-Einstein condensates, degenerate Fermi gases, optical lattices, quantum computing with atoms and ions, coherent control, and ultrafast and intense field interactions. Notably, all invited talks are plenary, with contributed poster sessions.