| Ardenno | |
| Official Name: | Comune di Ardenno |
| Coordinates: | 46.1667°N 48°W |
| Region: | Lombardy |
| Province: | Sondrio (SO) |
| Frazioni: | Pioda, Biolo, Gaggio, Scheneno, Piazzalunga, Pilasco |
| Mayor: | Laura Bonat |
| Area Total Km2: | 17.0 |
| Population Footnotes: | [1] |
| Population Total: | 3270 |
| Population As Of: | 31 December 2011 |
| Population Demonym: | Ardennesi |
| Elevation M: | 266 |
| Postal Code: | 23011 |
| Area Code: | 0342 |
Ardenno is a comune (municipality) in the Province of Sondrio in the Italian region Lombardy, located about 90km (60miles) northeast of Milan and about 15km (09miles) west of Sondrio.
The municipality of Ardenno contains the frazioni (subdivisions, mainly villages and hamlets) Pioda, Biolo, Gaggio, Scheneno, Piazzalunga and Pilasco .
Ardenno borders the following municipalities: Buglio in Monte, Civo, Dazio, Forcola, Talamona, Val Masino.