A parasite commonly refers to an organism that lives on or inside another organism, a phenomenon known as parasitism. Parasite or parasitism may also refer to:

Parasite (comics), a comic book character and enemy of Superman

Parasite (Heroes), the 18th episode of NBC's show Heroes

Parasite (band), a British band

Parasites (band), an American pop-punk band

Parasitism (social offense), a derogatory term denoting a member of human society who is considered to be detrimental to others by taking advantage of them in some way

Parasite (film), a horror movie starring Demi Moore

Parasite (artist), the artist name of UK breakcore producer Armin Elsaesser

Parisite, a rare mineral

"Parasites", a song by Ugly Casanova from their album Sharpen Your Teeth

"Parasite", a song by Nick Drake on his 1972 album Pink Moon.

"Parasite", a song by Kiss on their 1974 album Hotter Than Hell