Hyperbolus (Greek: Ὑπέρβολoς, Hyperbolos) was an Athenian politician active during the first half of the Peloponnesian war, coming to particular prominence after the death of Cleon.

Like Cleon, he counts as a demagogue, one who exercised power solely through speech in the assembly. It appears that like other such leaders he was wealthy. He is referred to by Aristophanes in the play Peace as having been a lampmaker previous to being a political figure.