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| Illy | |
|---|---|
| Church and town hall | |
| Coordinates: 49°44′12″N4°57′44″E / 49.7367°N 4.9622°E | |
| Country | France | 
| Region | Grand Est | 
| Department | Ardennes | 
| Arrondissement | Sedan | 
| Canton | Sedan-2 | 
| Intercommunality | Ardenne Métropole | 
| Government | |
| • Mayor (2020–2026) | Jacques Muller [1] | 
| Area 1 | 15.6 km2 (6.0 sq mi) | 
| Population  (2022) [2]  | 416 | 
| • Density | 27/km2 (69/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code |  08232 /08200 | 
| Elevation | 240 m (790 ft) | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Illy is a commune in the Ardennes department in northern France.
| Year | Pop. | ±% p.a. | 
|---|---|---|
| 1968 | 394 | — | 
| 1975 | 395 | +0.04% | 
| 1982 | 342 | −2.04% | 
| 1990 | 413 | +2.39% | 
| 1999 | 422 | +0.24% | 
| 2007 | 407 | −0.45% | 
| 2012 | 396 | −0.55% | 
| 2017 | 411 | +0.75% | 
| Source: INSEE [3] | ||