| Sigillo | |
| Official Name: | Comune di Sigillo |
| Coordinates: | 43.3311°N 12.7422°W |
| Region: | Umbria |
| Province: | Perugia (PG) |
| Frazioni: | Fontemaggio, Val di Ranco, Villa Scirca |
| Mayor: | Giampiero Fugnanesi |
| Area Total Km2: | 26.48 |
| Population Footnotes: | [1] |
| Population Total: | 2401 |
| Population As Of: | 30 June 2016 |
| Population Demonym: | Sigillani |
| Elevation M: | 490 |
| Saint: | St. Anne |
| Day: | July 26 |
| Postal Code: | 06028 |
| Area Code: | 075 |
Sigillo is a comune (municipality) in the province of Perugia in the Italian region Umbria, located about 35 km northeast of Perugia.
Sigillo borders the following municipalities: Costacciaro, Fabriano, Fossato di Vico, Gubbio.
Before the Roman conquest, the territory of Sigillo was inhabited by the Suillates, an Umbri tribe; later it was a Roman municipality as Suillum and was a stage on the Via Flaminia. In 410 it was destroyed by the Goths of Alaric I during his march to Rome.
Later it was part of the Lombard Duchy of Spoleto and of the gastaldate of Nocera, which, after the Frank conquest in the late 8th century, became the county of Nocera. In 1230 Emperor Frederick II destroyed it to punish its Guelph stance. The commune of Perugia rebuilt Sigillo in 1274 with a large castle. Subsequently the center was disputed between the Baglioni, Boldrino, Azzo and Montefeltro families, as well as by the condottiero Braccio da Montone. In 1500 it was sacked by Cesare Borgia and, in the mid-16th century, became part of the Papal States.