Apollonides (Ancient Greek: Ἀπολλωνίδης) of Sicyon was a man of ancient Greece who served as an ambassador for Achaea in the 2nd century BCE. When in 186 the great congress was held at Megalopolis, and the Attalid king Eumenes II wished to form an alliance with the Achaeans, and offered them a large sum of money as a present with a view of securing their favor, Apollonides of Sicyon strongly opposed the Achaeans' accepting the money, as something unworthy of them, and which would expose them to the influence of the king. He was supported by some other distinguished Achaeans, and they magnanimously refused accepting the money.