In Greek mythology, Phalanthus is the name of three men.
1. Phalanthus of Tanagra, one of the defenders of Thebes against the Seven Against Thebes. He was killed by Hippomedon.[1]
2. Phalanthus of Tarentum, the Spartan founder of Tarentum. Married to Aethra.
3. Phalanthus, son of Agelaus (son of Stympalus, son of Elatus, son of Arcas). A city in Arcadia was named after him.