| Martignacco | |
| Official Name: | Comune di Martignacco |
| Coordinates: | 46.1°N 21°W |
| Region: | Friuli-Venezia Giulia |
| Province: | Udine (UD) |
| Frazioni: | Casanova, Ceresetto, Faugnacco, Nogaredo di Prato, Torreano |
| Mayor Party: | Lega Nord |
| Mayor: | Marco Zanor |
| Area Total Km2: | 26.7 |
| Population Total: | 6377 |
| Population As Of: | 2010[1] |
| Elevation M: | 148 |
| Postal Code: | 33035 |
| Area Code: | 0432 |
Martignacco (Friulian: Martigna) is a Italian: [[comune]] (municipality) in the Regional decentralization entity of Udine in the Italian region of Friuli-Venezia Giulia, located about 70km (40miles) northwest of Trieste and about 9km (06miles) northwest of Udine.
Martignacco borders the following municipalities: Basiliano, Fagagna, Moruzzo, Pagnacco, Pasian di Prato, Tavagnacco.