The first settlements uncovered by archeologists in Alimos date back to the Neolithic period, and the excavation site can be found in the region of Euonymeia (Ano Kalamaki), immediately by the Vouliagmenis Avenue.

In classical antiquity, Halimous (Ancient Greek: Ἁλιμοῦς; also Alimous,[4] Ἀλιμοῦς[5]) was a fishing town on the outskirts of the city-state of Athens and constituted one of the demes of Attica.

The area of Ano Kalamaki, known as Euonymeia, constituted a distinct settlement, which in classical antiquity became the urban (asty) Deme of Euonymos.

Testament to its development during this period are the ruins of the amphitheater of Euonymos, quite unusual in the ancient world in its rectangular design.

[3] Alimos has public and private schools of grades, apart from higher education, in several places throughout the city.

The built-up area of Alimos is continuous with those of the neighbouring suburbs Palaio Faliro, Agios Dimitrios, Ilioupoli, Argyroupoli and Elliniko.

Many people here are the descendants of refugees from Kalkan Turkey, arriving in the Greek genocide Alimos is twinned with: