Jitter is the deviation in frequency of a signal.

Jitter may also refer to:

• Jitter (optics), the oscillatory motion of the image with respect to the detector, which blurs the recorded image
• Delay jitter, in packet switched networks
• Fixation (visual) or retinal jitter, the maintaining of the visual gaze on a single location
• Jittered, a method of supersampling
• Jitters (band), a Belarusian band from the 1990s and the 2000s
• The Jitters, a Canadian band from the 1980s
• Jitter, a package included in the Max visual programming language
• "Jitters" (Smallville), a 2001 TV episode