Authiou
| Authiou | |
|---|---|
| The church of Saint-Sulpice, in Authiou | |
| Location of Authiou | |
| Coordinates: 47°16′22″N 3°24′58″E / 47.2728°N 3.4161°E | |
| Country | France | 
| Region | Bourgogne-Franche-Comté | 
| Department | Nièvre | 
| Arrondissement | Clamecy | 
| Canton | Corbigny | 
| Intercommunality | CC Tannay-Brinon-Corbigny | 
| Government | |
| • Mayor (2020–2026) | Pierre de Becque | 
| Area 1 | 7.31 km2 (2.82 sq mi) | 
| Population  (2022) | 40 | 
| • Density | 5.5/km2 (14/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code | 58018 /58700 | 
| Elevation | 224–320 m (735–1,050 ft) | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Authiou (French pronunciation: [otju]) is a commune in the Nièvre department in central France.