  I address the question of whether supersymmetry provides a viable candidate
for the dark matter in the Universe. I review the properties of the lightest
neutralino as a candidate for solving the dark matter problem. I discuss the
neutralino's phenomenological and cosmological properties, and constraints from
present and future experiments. In the minimal supersymmetric model, the
neutralino mass has been experimentally excluded below some $20$ GeV, and is
not expected to be significantly larger than about $150$ GeV. I identify a
gaugino-like neutralino as the most natural dark matter candidate for a
plausible range of parameters. The requirement that the lightest neutralino be
the dominant matter component in the flat Universe provides non-trivial
restrictions on other parameters of the model, in particular on the masses of
the sfermions. Next, I study the consequences of adopting further grand
unification assumptions. In both scenarios I find sfermion masses most likely
beyond the reach of LEP 200 and the Tevatron but well within the discovery
potential of the SSC and the LHC. I also comment on the effects of relaxing
grand unification assumptions. Finally, I briefly outline prospects for the
neutralino dark matter searches.
