Sleep is critical for memory, but research indicates that eyewitness identification may be an exception. We conducted three experiments to assess the effect of self-reported sleep duration and quality the night before a mock-crime video, and current sleepiness, on eyewitness recall and identification. We found that duration and quality strongly predicted the recall of central details, but only weakly predicted the recall of peripheral details. Those reporting long duration or high quality had higher discriminability than those reporting short duration or low quality, for both lineups and showups in single-session experiments. Based on a two-part experiment, we found that poor sleep the night before a crime may be more impactful than sleep the night before an ID procedure. We conclude that self-reported sleep could be an important individual difference variable for eyewitness memory.