An update of the status of the revised 3C catalog of radio sources; 22 new galaxy redshifts.

An updated catalog is presented of the important optical data for the radio sources in the Revised Third Cambridge Catalog. Optical positions, redshifts, magnitudes, and identifications have been included as well as radio flux densities and spectral indices for the sample of 297 extragalactic 3CR sources. A bibliography of optical/radio data is also given. In addition to the literature compilation, new spectroscopic observations of 22 3CR galaxies with previously unpublished redshifts are presented.