Ameipsias was an Athenian comic poet of the 5th century BCE, writing during the period known as Old Comedy. He was a contemporary and rival of the more famous playwright Aristophanes, active during the final decades of the Peloponnesian War. Ameipsias competed in the major Athenian dramatic festivals, the City Dionysia and the Lenaea.

He is known to have achieved significant victories. In 423 BCE, his play Komnos won first prize at the City Dionysia, defeating Aristophanes' Clouds. He won again at the Lenaea festival in 414 BCE with his play Revellers (Kōmastai), which triumphed over Aristophanes' Birds. Only these two play titles and a small number of fragments of his work survive. Other titles are sometimes attributed to him, but these attributions are considered doubtful by scholars.

Ameipsias is historically important as a successful competitor who provides a broader view of Athenian Old Comedy beyond the works of Aristophanes. According to modern scholars, his victories demonstrate that contemporary audiences did not always favor Aristophanes. The surviving fragments, though scant, contribute to our understanding of the genre. For example, a fragment from Komnos mentions the philosopher Socrates, indicating that Ameipsias, like Aristophanes, featured him as a character. This offers another contemporary comic perspective on the famous thinker. His work is part of the fragmentary record that helps academics reconstruct the competitive landscape of early comic theater.