The province of Cagliari (Italian: provincia di Cagliari; Sardinian: provìntzia de Casteddu) was a province in the autonomous island region of Sardinia, Italy. Its capital city was Cagliari.

It had an area of 4,470 square kilometres (1,730 sq mi), and a total population of 543,310 (2001). There were 71 comuni (sg.: comune) in the province [1].

The historical province was suppressed by the 2016 Regional Decree Province of Cagliari and replaced by the Metropolitan City of Cagliari.

The valley of Piscinamanna is in the province.

As of June 30, 2005, the major comuni (municipalities) 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

	President	Term start	Term end	Party
	Alberto Palmas	1975	1982	Italian Communist Party
	Giuseppe Putzolu	1982	1985	Italian Communist Party
	Federico Baroschi	1985	1988	Italian Socialist Party
	Walter Piludu	1988	1990	Italian Communist Party
	Francesco Floris	1990	1993	Christian Democracy
	Eliseo Secci	1993	1994	Christian Democracy
	Cecilia Contu	1994	1995	Sardinian Action Party
	Nicola Scano	1995	2000	Democratic Party of the Left Democrats of the Left
	Sandro Balletto	2000	2005	Forza Italia
	Graziano Milia	2005	2010	Democrats of the Left Democratic Party
		2010	2012
–	Angela Quaquero	2012	2013	Deputy President
–	Pietro Cadau	2013	2014	Special Commissioner
–	Franco Sardi	2014	2016	Special Commissioner

The Democratic Party (Italian: Partito Democratico, PD) is a social-democratic political party in Italy, with The People of Freedom (Italian: Il Popolo della Libertà, PdL), it is one of the two major parties of the current Italian party system.

Cagliari Provincial Election Results June 2010
	Name	Party	1st Preference Votes	%	2nd Preference Votes	%
	Graziano Milia	PD	71.969	33,8	61.785	52,4
	Giuseppe Farris	PdL	99.053	46,5	56.074	47,6

• (in Italian) Official website

39°13′09″N 9°07′02″E / 39.2192°N 9.11722°E / 39.2192; 9.11722