| Authiou | |
| Commune Status: | Commune |
| Coordinates: | 47.2728°N 3.4161°W |
| Insee: | 58018 |
| Postal Code: | 58700 |
| Arrondissement: | Clamecy |
| Canton: | Corbigny |
| Intercommunality: | CC Tannay-Brinon-Corbigny |
| Mayor: | Pierre de Becque[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 224 |
| Elevation Max M: | 320 |
| Area Km2: | 7.31 |
Authiou (in French pronounced as /otju/) is a commune in the Nièvre department in central France.[2]