Results are presented for the inclusive jet cross section jet E_T
in p-pbar collisions at sqrt s = 1.8 TeV as measured by the CDF and D0
detectors at Fermilab's Tevatron collider.  The data are compared to
next-to-leading order QCD predictions using different input parton
distribution functions.  The ratio of inclusive jet cross sections at sqrt s =
0.63 TeV and sqrt s = 1.8 TeV, versus jet x_t, is also presented and compared
to QCD predictions.