The province of South Sardinia (Italian: provincia del Sud Sardegna; Sardinian: provìntzia de Sud Sardigna) is a province in the autonomous island region of Sardinia, Italy, instituted on 4 February 2016. It includes the suppressed provinces of Carbonia-Iglesias and Medio Campidano, a large part of the old province of Cagliari (without the 17 municipalities of the new Metropolitan City), and two other municipalities.

South Sardinia was instituted as a result of the law reforming provinces in Sardinia (Regional Law 2/2016). Once operational, it will include most of the geographic region of Campidano, the Sarrabus-Gerrei, the Trexenta and the Sulcis-Iglesiente. The provincial capital will be determined by the first provincial council, as well as the institution's statute.

In April 2021, under Sardinian Regional Council's Regional Law Nr. 7, the province was suppressed; the provinces of Carbonia-Iglesias (now bearing the name Sulcis Iglesiente) and Medio Campidano were restored, and the rest of the province would be absorbed into the Metropolitan City of Cagliari, minus the comune of Seulo (absorbed into province of Nuoro). Whilst the Italian government challenged the law, thus stalling its implementation, on March 12, 2022, the Constitutional Court ruled in favor of the Autonomous Region of Sardinia. On April 13, 2023, the regional council, at the proposal of the regional government, approved an amendment to the 2021 reform, defining the timeframe and manner of its implementation, which would see its full implementation in 2024.

Historical population

Year	Pop.	±%
1951	359,476	—
1961	374,961	+4.3%
1971	359,078	−4.2%
1981	377,993	+5.3%
1991	382,914	+1.3%
2001	368,343	−3.8%
2011	361,945	−1.7%
2021	337,178	−6.8%
Source: ISTAT

• From the province of Carbonia-Iglesias (all 23): Buggerru, Calasetta, Carbonia, Carloforte, Domusnovas, Fluminimaggiore, Giba, Gonnesa, Iglesias, Masainas, Musei, Narcao, Nuxis, Perdaxius, Piscinas, Portoscuso, San Giovanni Suergiu, Sant'Anna Arresi, Sant'Antioco, Santadi, Tratalias, Villamassargia, Villaperuccio
• From the province of Medio Campidano (all 28): Arbus, Barumini, Collinas, Furtei, Genuri, Gesturi, Gonnosfanadiga, Guspini, Las Plassas, Lunamatrona, Pabillonis, Pauli Arbarei, Samassi, San Gavino Monreale, Sanluri, Sardara, Segariu, Serramanna, Serrenti, Setzu, Siddi, Tuili, Turri, Ussaramanna, Villacidro, Villamar, Villanovaforru, Villanovafranca
• From the province of Cagliari (54 of 71): Armungia, Ballao, Barrali, Burcei, Castiadas, Decimoputzu, Dolianova, Domus de Maria, Donori, Escalaplano, Escolca, Esterzili, Gergei, Gesico, Goni, Guamaggiore, Guasila, Isili, Mandas, Monastir, Muravera, Nuragus, Nurallao, Nuraminis, Nurri, Orroli, Ortacesus, Pimentel, Sadali, Samatzai, San Basilio, San Nicolò Gerrei, San Sperate, San Vito, Sant'Andrea Frius, Selegas, Senorbì, Serdiana, Serri, Seulo, Siliqua, Silius, Siurgus Donigala, Soleminis, Suelli, Teulada, Ussana, Vallermosa, Villanova Tulo, Villaputzu, Villasalto, Villasimius, Villasor, Villaspeciosa
• From the province of Ogliastra: Seui
• From the province of Oristano: Genoni

	President	Term start	Term end	Party
–	Giorgio Sanna	4 February 2016	1 January 2018	Special Commissioner
–	Mario Mossa	1 January 2018	Incumbent	Special Commissioner

39°09′00″N 8°31′00″E / 39.1500°N 8.5167°E / 39.1500; 8.5167