  I review the results of hadron spectroscopy calculations from lattice QCD for
an intended audience of low energy hadronic physicists. I briefly introduce the
ideas of numerical lattice QCD. The various systematic errors, such as the
lattice spacing and volume dependence, in lattice QCD calculations are
discussed. In addition to the discussion of the properties of ground state
hadrons, I also review the small amount of work done on the spectroscopy of
excited hadrons and the effect of electromagnetic fields on hadron masses. I
also discuss the attempts to understand the physical mechanisms behind hadron
mass splittings.
