  In order to observe annihilation and decay of dark matter, several types of
potential sources should be considered. Some sources, such as dwarf galaxies,
are expected to have very low astrophysical backgrounds but fairly small dark
matter densities. Other sources, like the Galactic center, are expected to have
larger densities of dark matter but also have more complicated backgrounds from
other astrophysical sources. To search for signatures of dark matter, the large
field-of-view of the HAWC detector, covering 2 sr at a time, especially enables
searches from sources of dark matter annihilation and decay, which are extended
over several degrees on the sky. With a sensitivity over 2/3 of the sky, HAWC
has the ability to probe a large fraction of the sky for the signals of
TeV-mass dark matter. In particular, HAWC should be the most sensitive
experiment to signals coming from dark matter with masses greater than 10-100
TeV. We present the HAWC sensitivity to annihilating and decaying dark matter
signals for several likely sources of these signals.
