| Treppo Ligosullo | |
| Coordinates: | 46.5333°N 17°W |
| Region: | Friuli-Venezia Giulia |
| Province: | Udine (UD) |
| Frazioni: | Gleriis, Ligosullo, Murzalis, Siaio, Tausia, Treppo Carnico, Zenodis |
| Area Total Km2: | 35.59 |
| Population Total: | 715 |
| Population As Of: | 30 September 2017 |
| Elevation M: | 671 |
| Postal Code: | 31020 |
| Area Code: | 0433 |
Treppo Ligosullo (Friulian: Trèp Liussûl)[1] [2] is a Italian: [[comune]] (municipality) in the Regional decentralization entity of Udine in the Italian region of Friuli-Venezia Giulia. It was established on 1 February 2018 by the merger of Ligosullo and Treppo Carnico.