Aliartos (Greek: Αλίαρτος) is a small town and former municipality in the Boeotia regional unit, Greece, at 109 kilometres from Athens and about 18 kilometres west of Thebes.

In the early 19th century, the site was occupied by two small agricultural settlements, Moulki (Μούλκι) and Krimpas (Κριμπάς).

In 1835, the name of ancient Haliartus was revived for the newly established municipality which encompassed these settlements.

Krimpas was renamed to Aliartos in June 1919,[3] but in 1951 the settlement was disbanded and the name was transferred in July 1953 to Moulki.

Aliartos lies in the center of the Kopais (Kωπαΐδα) plain.