Ilisiakos spent the majority of its later history in the Greek second division; however, the footballing arm of the club merged with Egaleo F.C.

Prior to the founding of Ilisiakos, Dafni Ilisia pre-existed in 1924, as an independent association which competed in an open space (plot), located east of the Hilton Hotel, between Hatzigianni Mexi, Iridanou and Vasilissis Sofias streets.

So in 1927 Ilisiakos was born, by some romantic and dreamy young people of that time (Michalis Xydis, Livaditis, Lambropoulos, Eugenopoulos, Plessas etc.)

with only a part of football, initially included in the Third Athens EPSA, of which he was also Founding member, playing in various stadiums such as the Panhellenic, the Gymnastics Academy in Daphne and Panathinaikos.

The original emblem for the club was the footballer in action, to be soon replaced by a laurel-crowned Ita, which has since been established and remains unchanged to this day.