  Recent results on searches for new particles at the electron-proton collider
HERA are reported. Based on roughly 100pb-1 of e^+p data and 16pb-1 of e^-p
data per experiment, taken in the years 1994-2000, the H1 and ZEUS
collaborations have derived new exclusion limits for the direct production of
excited fermion states and leptoquarks. The latter are searched for in
different decay channels, including lepton-flavor violating decays. The
production of R_P-violating squarks followed by leptoquark-like decays to
lepton and quark is studied, as are cascade decays yielding multi-jet plus
lepton signatures. New limits from indirect searches are also reported. Several
of the searches obtain sensitivities of the same order or exceeding those of
other experiments, indicating the substantial discovery potential of future
HERA running.
