  Host galaxies are an excellent means of probing the natal environments that
generate gamma-ray bursts (GRBs). Recent work on the host galaxies of
short-duration GRBs has offered new insights into the parent stellar
populations and ages of their enigmatic progenitors. Similarly, surveys of
long-duration GRB (LGRB) host environments and their ISM properties have
produced intriguing new results with important implications for long GRB
progenitor models. These host studies are also critical in evaluating the
utility of LGRBs as potential tracers of star formation and metallicity at high
redshifts. I will summarize the latest research on LGRB host galaxies, and
discuss the resulting impact on our understanding of these events' progenitors,
energetics, and cosmological applications.
