Sedini (Sassarese: Séddini) is a comune (municipality) in the Metropolitan City of Sassari in the Italian region Sardinia, located about 180 kilometres (110 mi) north of Cagliari and about 25 kilometres (16 mi) northeast of Sassari. It is part of the Anglona traditional subregion.
Sedini borders the following municipalities: Bulzi, Castelsardo, Laerru, Nulvi, Santa Maria Coghinas, Tergu, Valledoria.
Sassarese (natively sassaresu [sasːaˈrezu] or turritanu; Sardinian: tataresu [tataˈɾezu]) is an Italo-Dalmatian language spoken in coastal areas of northwestern Sardinia, Italy. Closely related to Gallurese and Corsican, it has its roots in medieval Tuscan because of Sassari's historic ties with Tuscany and geographical proximity to Corsica, despite the robust Sardinian influences (in terms of vocabulary and phonology, as well as syntax). Due to its origins, Sassarese has several similarities to the Italian language.
Sassarese is spoken by approximately 100,000 people, out of a total population of 175,000 in its area. Large Sassarese-speaking communities are present in Sassari, Stintino, Sorso, and Porto Torres. The Sassarese varieties transitioning to Gallurese, known as the Castellanesi dialects, can be heard in Castelsardo, Tergu, and Sedini.