Luserna San Giovanni (Occitan: Luzerna e San Jan, Piedmontese: Luserna e San Gioann) is a comune (municipality) in the province of Turin in the Italian region Piedmont, located in the Val Pellice about 45 km southwest of Turin.

Luserna San Giovanni borders the following municipalities: Angrogna, Bricherasio, Torre Pellice, Bibiana, Lusernetta, Rorà, and Bagnolo Piemonte.

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Luserna (Cimbrian: Lusérn, German: Lusern) is a comune (municipality) in Trentino in the northern Italian region Trentino-Alto Adige/Südtirol, located about 25 km southeast of Trento. As of 31 December 2004, it had a population of 284 and an area of 8.2 km².

Lusérn borders the following municipalities: Caldonazzo, Lavarone, Levico Terme, Pedemonte, Rotzo and Valdastico.

Lusérn is the centre of Cimbrian language and culture. In the 2001 census, around 90% of the people of Lusérn stated Cimbrian, an Upper German dialect of the Germanic language, to be their first language. Formerly, Cimbrian was also spoken in neighbouring Lavarone, and in the so-called Seven Communities and Thirteen Communities. A cultural institute was decreed by provincial law and receives funds from the Italian state to help preserve the unique tradition, culture and language.

The Cimbrian spoken in Lusérn is a slightly different dialect from Cimbrian spoken elsewhere.

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San Giovanni, the Italian form of "Saint John", a name that may refer to dozens of saints.

At least 58 comuni in Italy are named San Giovanni, and at least 49 more are named San Giovanni... (as in San Giovanni Valdarno in Tuscany), and hundreds of frazioni and smaller villages. Many hundreds, probably even thousands, of churches are also named after the various saints hiding under the simple "Giovanni", among them:

San Giovanni may also refer to: