The Poliyiros Museum, which is in Iroou Square in the town centre, displays representative archaeological finds from all over Halkidiki. More specifically, they cover a span of time ranging from the Bronze Age to the Roman period and come from ancient Stageira (near Olympias), Toroni, Pyrgadikia, Afytos, Poliyiros, Ierissos, and Stratoni, as also from the ancient city of Olynthos.

The most important exhibits are an unfinished kouros of the Archaic period, weapons and jewellery of the Late Archaic and Classical periods, a marble head of Dionysos from ancient Aphytos (4^th cent. bc), a black-figure column crater from Vrasta (late 6^th cent. bc), and two marble grave statues from the heroön at Stratoni (1^st cent. bc). Particularly important are the finds from the city and the cemetery of Olynthos, of the Archaic and Classical period, because they give a full picture of the everyday activities and the public life of that time.

The museum has hosted an exhibition titled ‘Three Colonies of Andros in Chalcidice: Sane, Akanthos, Stageira since 1998. Among many other things it includes three standing or kneeling statues of Nike from the roof of a naïskos of the sixth century bc, which was originally at Sane and was later incorporated into the urban complex of Ouranoupoli.

Thanks to the exhibition, the Poliyiros Museum won the 16^th Directorate of Prehistoric and Classical Antiquities’ Museum of the Year Award in 1998.