Ilion (ancient form Ilium) (Greek, Ίλιον), previously named Nea Liossia (Greek Νέα Λιόσια), is a suburb in the west-northwest part of Athens, Greece. The two mountaintops of Aigaleo lie to the west. It is also located east-southeast of Eleusis, south of Attiki Odos (number 6), west and southwest of Kifissou Avenue (GR-1/E75, northwest Athens), and north of Piraeus and Poseidonos Avenue. The main streets are Fylis (Hasias) Ave. (linking to Kamatero and Ano Liosia), Thivon st. (linking to Peristeri) and Idomeneos and Protesilaou st. (linking to Petroupoli).
| Year | Population | Change |
|---|---|---|
| 1951 | 5,460 | - |
| 1961 | 31,810 | +26,350 / +482.60% |
| 1971 | 56,127 | +24,317 / +76.44% |
| 1981 | 72,427 | +16,300 / +29.04% |
| 1991 | 78,326 | +5,899 / +8.14% |
| 2001 | 80,859 | +2,533 / +3.23% |
| Northwest: Ano Liosia | North: Ano Liosia and Kamatero | |
| West: Petroupoli | Ilio (Nea Liosia) | East: Agioi Anargyroi |
| South: Peristeri |