Projector may refer to:

• Video projector, a device that projects a video signal from computer, home theater system etc.
• Movie projector, a device that projects moving pictures from a filmstrip
• Slide projector, a device that projects a still image with a transparent base
• Overhead projector, a device that projects a transparent image
• Opaque projector, a predecessor to the overhead projector
• Magic lantern, a historic projection device
• Camera obscura, the historic ancestor to projection devices
• Enlarger, a device used to produce photographic prints from negatives
• Ceiling projector, a device used to measure the height of clouds
• Projector (album), an album by Dark Tranquility
• A type of mortar (weapon)
• A version control system used in the Macintosh Programmer's Workshop

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