Province of Cagliari
The province of Cagliari was a province in the autonomous island region of Sardinia, Italy. Its capital city was Cagliari.
It had an area of, and a total population of 543,310. There were 71 comuni in the province .
The historical province was suppressed by the 2016 Regional Decree Province of Cagliari and replaced by the Metropolitan City of Cagliari and by the province of South Sardinia. However, with the disestablishment of South Sardinia and the formation of the provinces of Sulcis Iglesiente and Medio Campidano, the Metropolitan City was effectively restored to the borders of the old Province.
Geography
The valley of Piscinamanna is in the province.Major ''comuni''
As of June 30, 2005, the major comuni by population was:| Comune | Population |
| Cagliari | 160,886 |
| Quartu Sant'Elena | 70,020 |
| Selargius | 28,682 |
| Assemini | 25,531 |
| Capoterra | 22,620 |
| Monserrato | 20,809 |
| Sestu | 17,413 |
| Sinnai | 16,043 |
| Quartucciu | 11,503 |
| Elmas | 8,533 |
| Dolianova | 8,280 |
| Decimomannu | 7,079 |
| San Sperate | 7,037 |
| Villasor | 7,022 |
| Maracalagonis | 7,000 |
| Pula | 6,959 |
| Uta | 6,928 |
| Settimo San Pietro | 6,098 |
| Sarroch | 5,275 |