|  | This article may be expanded with text translated from the corresponding article in French. (December 2008)Click [show] for important translation instructions. 
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| Billy-sur-Aisne | |
|---|---|
| The town hall of Billy-sur-Aisne | |
| Coordinates: 49°21′24″N3°23′02″E / 49.3567°N 3.3839°E Coordinates: 49°21′24″N3°23′02″E / 49.3567°N 3.3839°E | |
| Country | France | 
| Region | Hauts-de-France | 
| Department | Aisne | 
| Arrondissement | Soissons | 
| Canton | Soissons-2 | 
| Intercommunality | GrandSoissons Agglomération | 
| Government | |
| • Mayor (2020–2026) | Jean-François De Baere [1] | 
| Area 1 | 7.47 km2 (2.88 sq mi) | 
| Population | 1,148 | 
| • Density | 150/km2 (400/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code |  02089 /02200 | 
| Elevation | 56–160 m (184–525 ft) (avg. 72 m or 236 ft) | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Billy-sur-Aisne is a commune in the department of Aisne in Hauts-de-France in northern France.
| Year | Pop. | ±% | 
|---|---|---|
| 1962 | 926 | — | 
| 1968 | 1,160 | +25.3% | 
| 1975 | 1,256 | +8.3% | 
| 1982 | 1,338 | +6.5% | 
| 1990 | 1,279 | −4.4% | 
| 1999 | 1,189 | −7.0% | 
| 2008 | 1,099 | −7.6% | 
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