As of 2026-10-12, Muhammadiyah tops the list with 60,000,000 members.
- #1 Muhammadiyah — 60,000,000 members
religious organizations in Indonesia
Muhammadiyah, officially the Muhammadiyah Society, is a major Islamic mass organization in Indonesia. The organization was founded in 1912 by Ahmad Dahlan in the city of Yogyakarta as a reformist socio-religious movement. Muhammadiyah promotes ijtihad, the contextual and dynamic derivation of Islamic law directly from the Qur'an and sunnah, and rejects taqlid, blind adherence. Since its inception, Muhammadiyah has implemented a platform of renewal that integrates religious and secular... Read more on Wikipedia.
Wikidata - #2 Seventh-day Adventist Church — 22,127,000 members
Christian denomination
The Seventh-day Adventist Church (SDA) is an Adventist Christian denomination which is distinguished by its observance of Saturday, the seventh day of the week in the Christian (Gregorian) and the Hebrew calendar, as the Sabbath; its emphasis on the imminent Second Coming (advent) of Jesus Christ; and its annihilationist soteriology. The denomination grew out of the Millerite movement in the United States during the mid-19th century, and it was formally established in 1863. Among its... Read more on Wikipedia.
Wikidata - #3 Fujinkai — 15,000,000 members source Wikidata
- #4 Bundesarbeitsgemeinschaft der Seniorenorganisationen — 13,000,000 members
advocacy group
The German National Association of Senior Citizens' Organizations is an umbrella organization of about 120 civil society organizations, which together represent several million older people. BAGSO is a Nonprofit organization based in Bonn and it was founded in 1989. Read more on Wikipedia.
Wikidata - #5 National Council of German Women's Organizations — 11,000,000 members
umbrella organization of German women's associations and women's societies
The National Council of German Women's Organizations – German Women's Lobby is a German umbrella organization for organizations concerned with women's rights and gender equality. One of Europe's largest women's organizations, it includes 62 member organizations with 11 million members. Read more on Wikipedia.
Wikidata - #6 All-China Women’s Federation — 7,800,000 members
women's organization in China
The All-China Women's Federation (ACWF) is a people's organization established during the Chinese Civil War on 24 March 1949. It was originally called the All-China Democratic Women's Foundation, and was renamed the All-China Women's Federation in 1957. It has acted as the official leader of the women's movement in the People's Republic of China since its founding in 1949. Read more on Wikipedia.
Wikidata - #7 Roman Catholic Archdiocese of Kinshasa — 7,118,000 members
Metropolitan See for the Ecclesiastical province of Kinshasa in the Democratic Republic of the Congo
The Archdiocese of Kinshasa is an archdiocese of the Roman Catholic Church in the Democratic Republic of the Congo. Its ecclesiastic territory includes the capital city of Kinshasa and surrounding districts. The archdiocese is the metropolitan see for the Ecclesiastical Province of Kinshasa. The current archbishop is Fridolin Ambongo Besungu. Read more on Wikipedia.
Wikidata - #8 Confederation of German Trade Unions — 5,995,437 members
German union federation
The German Trade Union Confederation is an umbrella organisation for eight German trade unions, in total representing more than 5.4 million people. It was founded in Munich on 12 October 1949. Read more on Wikipedia.
Wikidata - #9 Italian General Confederation of Labour — 5,518,774 members
Italian trade union
The Italian General Confederation of Labour is a national trade union centre in Italy. It was formed by an agreement between socialists, communists, and Christian democrats in the "Pact of Rome" of June 1944. In 1950, socialists and Christian democrats split forming UIL and CISL, and since then the CGIL has been influenced by the Italian Communist Party (PCI) and until recent years by its political heirs: the Democratic Party of the Left (PDS), the Democrats of the Left (DS) and currently the... Read more on Wikipedia.
Wikidata - #10 Italian Confederation of Workers' Trade Unions — 4,082,056 members
Italian trade union association
The Italian Confederation of Trades Unions is a national trade union centre in Italy representing various Catholic-inspired groups linked with Christian Democracy party. Read more on Wikipedia.
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