| Nonette | |
| Image Alt: | Nonette river |
| Map: | Nonette.png |
| Mouth Coordinates: | 49.2028°N 2.3997°W |
| Subdivision Type1: | Country |
| Length: | 40km (30miles) |
The Nonette is a tributary to the river Oise in northern France. It is 40.4km (25.1miles) long. Its source is in Nanteuil-le-Haudouin, from which it flows west through Senlis and Chantilly, and joins the Oise near Saint-Leu-d'Esserent.
The river has relatively high turbidity and its brownish water has a modest velocity due to the slight gradient of the watercourse; pH levels have been measured at 9.25 or quite alkaline[1] near the Château d'Ermenonville and electrical conductivity of the waters have tested at 81 micro-siemens per centimetre.