|Comune di San Gemini|
|Frazioni||Acquavogliera, Colle Pizzuto, Quadrelletto, Sangemini Fonte|
|• Mayor||Luciano Clementella|
|• Total||27.9 km2 (10.8 sq mi)|
|Elevation||337 m (1,106 ft)|
(30 June 2016)
|• Density||180/km2 (470/sq mi)|
|Time zone||UTC+1 (CET)|
|• Summer (DST)||UTC+2 (CEST)|
|Patron saint||San Gemine|
|Saint day||9 October|
The town is a well-preserved medieval burgh with two lines of walls, built over the remains of a small Roman center along the old Via Flaminia. It is especially known for its mineral waters.
- San Gemini Cathedral or Duomo - a 12-century church dedicated to the commune's patron, the locally venerated Saint Gemine, whose relics were recovered in 1775, was rebuilt in 1817. Brother Gemine was a monk of Syrian origins who died in 815. The burial urn and original stone are conserved in the sacristy; the saint has been reburied under the high altar. The saint's day is 9 October.
- Carsulae -Archeological site
- San Nicolò - Romanesque architecture church.
- San Francesco - Franciscan church with 15th-century frescoes.
- Geolab, a permanent exhibition devoted to geological sciences.
- San Giovanni Battista -11th century church
- San Carlo -15th century church
- "Superficie di Comuni Province e Regioni italiane al 9 ottobre 2011". Istat. Retrieved 16 March 2019.
- "Popolazione Residente al 1° Gennaio 2018". Istat. Retrieved 16 March 2019.
- All demographics and other statistics: Italian statistical institute Istat.
- Umbria online: San Gemini