  We perform a systematic analysis of scalar and vector leptoquark pair
production at the Fermilab Tevatron and at the CERN LHC. We evaluate signal
expectations and background levels for the processes pp (p ppar) -> 2 jets +
e^{+} + e^{-} and 2 jets + e + missing p_T. The Monte Carlo event generator
ISAJET is used to simulate the experimental conditions at the current
(Sqrt{s}=1.8 TeV, Luminosity=100 pb^{-1}) and upgraded (Luminosity=100 pb^{-1})
Tevatron as well as the LHC (Sqrt{s}=14 TeV, Luminosity=10 fb^{-1}). Depending
on the luminosity, and assuming a branching ratio B(LQ -> eq)=0.5, we find a
discovery reach up to 170 (255) GeV for scalar leptoquarks at the current
(upgraded) Tevatron. Similarly, we find vector leptoquarks to be detectable at
masses below 300 (400) GeV depending on the coupling. At the LHC, the discovery
reach is enhanced to 1 TeV for scalar leptoquarks and to 1.5 TeV for vectors.
