San Sebastian he is a Christian martyr, venerated as a saint by the Catholic Church. Several Italian towns are named after him:
Italy
- San Sebastiano al Vesuvio, municipality in the province of Naples
- San Sebastiano Curone, municipality in the province of Alexandria
- San Sebastiano da Po, municipality in the province of Turin
- San Sebastian is the name of several hamlets or localities of the municipalities of: Agliano Terme, Bisegna, Bisegna, Civitella d'Agliano, Cologna Veneta, Elmas, Finale Ligure, Folgaria, Foligno, Fossano, Lumezzane, Monforte d'Alba, Monte San Giovanni in Sabina, Sciacca, Sessame, Tagliacozzo, Teglio
- Ville San Sebastiano is a fraction of Borgomaro
- San Sebastiano Petrete is a fraction of Castelforte
- Villa San Sebastiano is a fraction of Tagliacozzo
- San Sebastiano TrainoVilla Celiera
- San Sebastiano Refuge at the Duran Pass is a fraction of Zoldo Alto
In the past the city was also called San Sebastiano Spanish of San Sebastián.