The country has an area of 328,100 square miles and a population of 23 million.
Virtually all citizens are Muslims, predominantly belonging to either the Zaydi order of Shi'a Islam or the Shafa'i order of Sunni Islam. While there are no available statistics, Zaydis make up an estimated 45 percent and Shafa'is 55 percent of the population. There are a few thousand Ismaili Muslims who reside mainly in the north. There are reportedly 150 Baha'is.
Jews are the only indigenous non-Muslim religious minority. Nearly all of the once-sizable Jewish population has emigrated. Fewer than 250 Jews remain in Amran Governorate in the north of the country. The Government's inability to adequately protect this community from increased threats has led to the desire of much of the community to emigrate. Since January 2007 the historic Saada Governorate community of 60 Jews has lived in Sana'a, under the protection and care of the Government, after abandoning their homes in the face of threats from al-Houthi rebels. The community has abandoned its synagogues in Saada. Until the increase in violence against the Jewish community in December 2008 and January 2009 forced their closure, there were at least two functioning synagogues in Amran Governorate.
There are an estimated 3,000 Christians throughout the country, most of whom are refugees or temporary foreign residents. There are four churches in Aden, three Roman Catholic and one Anglican. There are approximately 40 Hindus living in Aden who trace their origins to India. Aden has one Hindu temple.
Among religious minorities, approximately 1,000 Christians and most Jews actively participated in some form of formal religious service or ritual, although not always in a public place of worship.