Demographics of the member states of the Organisation of Islamic Cooperation

This is a list of 57 member states of the Organisation of Islamic Cooperation sorted by their estimated population. It is sourced from the global list of countries by population page, as of June 2019^[update].

Population

Rank	Country	Total Population (all religions)
1	Indonesia	268,074,600
2	Pakistan	212,742,631
3	Nigeria	193,392,517
4	Bangladesh	166,290,000
5	Egypt	98,467,400
6	Iran	82,321,600
7	Turkey	82,003,882
8	Algeria	43,378,027
9	Sudan	41,394,625
10	Iraq	39,127,900
11	Morocco	34,974,200
12	Uganda	40,006,700
13	Saudi Arabia	33,413,660
14	Uzbekistan	33,412,688
15	Malaysia	32,666,700
16	Afghanistan	31,575,018
17	Yemen	29,579,986
18	Mozambique	28,861,863
19	Ivory Coast	25,823,071
20	Cameroon	24,348,251
21	Niger	22,314,743
22	Burkina Faso	20,870,060
23	Mali	19,973,000
24	Syria	18,499,181
25	Kazakhstan	18,446,552
26	Senegal	16,209,125
27	Chad	15,692,969
28	Somalia	15,636,171
29	Guinea	12,218,357
30	Benin	11,733,059
31	Tunisia	11,551,448
32	Jordan	10,381,500
33	Azerbaijan	9,981,457
34	United Arab Emirates	9,682,088
35	Tajikistan	8,931,000
36	Sierra Leone	7,901,454
37	Togo	7,538,000
38	Libya	6,569,864
39	Kyrgyzstan	6,389,500
40	Lebanon	6,065,922
41	Turkmenistan	5,634,555
42	Palestine	4,780,978
43	Oman	4,672,823
44	Kuwait	4,226,920
45	Mauritania	4,077,347
46	Albania	2,862,427
47	Qatar	2,772,947
48	Gambia	2,228,075
49	Gabon	2,109,099
50	Guinea-Bissau	1,604,528
51	Bahrain	1,543,300
52	Djibouti	1,078,373
53	Comoros	873,724
54	Guyana	786,508
55	Suriname	573,085
56	Maldives	427,756
57	Brunei	421,300
	Total (all religions)	1,810,399,070

^ "Religious Composition by Country" (PDF). Global Religious Landscape. Pew Forum. Archived from the original (PDF) on 9 September 2013. Retrieved 9 July 2013.