Religion in Yemen consists primarily of two principal Islamic religious groups; 53% of the Muslim population is Sunni and 45% is Shiite according to the UNHCR. Sunnis are primarily Shafi'i but also include significant groups of Malikis and Hanbalis. Shi'is are primarily Zaidis and also have significant minorities of Twelver Shias and Musta'ali Western Isma'ili Shias (see Shia Population of the Middle East). Approximately 53% of Yemenis are Sunnis, while 45% are Zaydi Shias.
The Sunnis are predominantly in the south and southeast. The Zaidis are predominantly in the north and northwest whilst the Ismailis are in the main centers such as Sana'a and Ma'rib. There are mixed communities in the larger cities. About 1 percent of Yemenis are non-Muslim, adhering to Christianity, Judaism, Hinduism, or Atheism. In the Yemenite city of Aden, there is still a significant population of Hindus however some have left due to the current conflict in Yemen. In the 1980s, 44% of people in Aden were Hindus however this has rapidly decreased to most probably 10%
