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thumb|[[Dublin Mosque]]
The documented history of Islam in the Republic of Ireland dates back to the 1950s. The number of Muslims in Ireland has increased since the 1990s, mostly through immigration. For the 2022 Irish census, 81,930 were counted within the Republic of Ireland. There are around 12,000 Muslims within Northern Ireland.
History
The earliest mention of Ireland in Muslim sources originates in the works of Al-Idrisi in his Tabula Rogeriana mentioned Irlandah-al-Kabirah (Great Ireland).
The organisational history of Islam in Ireland is complex, not least because of the great variety of ethnic backgrounds of Muslims in the country. The first Islamic Society in Ireland was established in 1959, formed by students studying in Ireland and was called the Dublin Islamic Society (later called the Islamic Foundation of Ireland). At that time there was no mosque in Dublin, so the students used their homes and later rented halls for Jumu'ah (Friday) and Eid (Muslim holiday) prayers. In 1976 the first mosque and Islamic centre in Ireland was opened in a four-storey building at 7 Harrington Street, Dublin 8. Among those who contributed to the cost of the mosque and Islamic centre was the late King Faisal of Saudi Arabia. In 1981, the Ministry of Endowment and Islamic Affairs of Kuwait sponsored a full-time imam for the mosque.
The Belfast Islamic Centre was founded in Belfast in 1978. The Centre is currently located on the corner of University Road and Fountainville Avenue in South Belfast.
In 1992, Moosajee Bhamjee became the first (and to date only) Muslim Teachta Dála (Member of Irish Parliament).