We report the first grazing-angle neutron-diffraction experiment. Byrelaxing all collimations except that of the incident beam, we have obtainedadequate intensity to observe simultaneously the specularly reflected and(1/bar 1/1) grazing-angle diffracted beams from the (110) surface of alarge perfect silicon crystal. This measurement demonstrates that, underappropriate experimental conditions, grazing-angle neutron diffraction can beused as a probe of surface and interface structures. The technique can be usedto particular advantage with those materials to which neutrons are uniquelysensitive, e.g., magnetic or hydrogen-rich thin films.