| Name | Status | Population census 1991-10-20 | Population census 2001-10-21 | Population census 2011-10-09 | |
|---|---|---|---|---|---|
| Carbonia-Iglesias | Province | 139,667 | 131,890 | 128,540 | o |
| Sardegna [Sardinia] | Autonomous Region | 1,648,248 | 1,631,880 | 1,639,362 |
| Name | Status | Population census 1991-10-20 | Population census 2001-10-21 | Population census 2011-10-09 | |
|---|---|---|---|---|---|
| Buggerru | Commune | 1,233 | 1,163 | 1,108 | o |
| Calasetta | Commune | 2,681 | 2,745 | 2,822 | o |
| Carbonia | Commune | 32,887 | 30,447 | 28,882 | o |
| Carloforte | Commune | 6,629 | 6,444 | 6,301 | o |
| Domusnovas | Commune | 6,926 | 6,582 | 6,416 | o |
| Fluminimaggiore | Commune | 3,241 | 3,134 | 2,966 | o |
| Giba | Commune | 2,286 | 2,093 | 2,120 | o |
| Gonnesa | Commune | 5,458 | 5,169 | 5,135 | o |
| Iglesias | Commune | 30,134 | 28,170 | 27,674 | o |
| Masainas | Commune | 1,546 | 1,479 | 1,350 | o |
| Musei | Commune | 1,451 | 1,506 | 1,522 | o |
| Narcao | Commune | 3,579 | 3,365 | 3,373 | o |
| Nuxis | Commune | 1,834 | 1,703 | 1,631 | o |
| Perdaxius | Commune | 1,516 | 1,465 | 1,475 | o |
| Piscinas | Commune | 992 | 886 | 872 | o |
| Portoscuso | Commune | 5,868 | 5,392 | 5,236 | o |
| San Giovanni Suergiu | Commune | 6,342 | 6,116 | 6,020 | o |
| Santadi | Commune | 4,061 | 3,767 | 3,570 | o |
| Sant'Anna Arresi | Commune | 2,516 | 2,583 | 2,712 | o |
| Sant'Antioco | Commune | 12,313 | 11,730 | 11,496 | o |
| Tratalias | Commune | 1,189 | 1,121 | 1,107 | o |
| Villamassargia | Commune | 3,825 | 3,713 | 3,655 | o |
| Villaperuccio | Commune | 1,160 | 1,117 | 1,097 | o |
Source: Istituto Nazionale di Statistica Italia (web).
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