Diffractive Results from the Tevatron

Hard diffraction in events with dijets and rapidity gaps has been studied by D\O and CDF for three processes: hard color singlet exchange, hard single diffraction, and hard double pomeron exchange, using Tevatron $\bar pp$ data at $\sqrt{s}$ = 630 GeV and 1.8 TeV. Measurements of rates, $\eta, E_T$ and $\sqrt{s}$ dependencies are presented and comparisons made with predictions of several models.