Four methods developed during the past five years for the determination of the velocity of lightin vacuoare reviewed. These include coincidence-counter determinations of gamma-ray velocities, band-spectra methods, Froome's microwave interferometer, and Florman's radiofrequency interferometer. The results of recent repetitions of Bergstrand's geodimeter measurement ofcare also summarized. The best measurements by a variety of techniques yield a weighted average of 299 792.8 km/sec forc, with a probable error of ±0.2 km/sec. A reasonable limit of error of ±0.6 km/sec is recommended. Some reasons for the low values ofcobtained previously by optical techniques are discussed.