Christianity is the main religion practised in the city.
Aberdeen's largest denominations are the Church of Scotland (through the Presbytery of Aberdeen) and the Roman Catholic Church, both with numerous churches across the city, with the Scottish Episcopal Church having the third-largest number.
The most recent census in 2001 showed that Aberdeen has the highest proportion of non-religious residents of any city in Scotland, with nearly 43% of citizens claiming to have no religion and several former churches in the city have been converted into bars and restaurants.
In the Middle Ages, the Kirk of St Nicholas was the only burgh kirk and one of Scotland's largest parish churches.
Like a number of other Scottish kirks, it was subdivided after the Reformation, in this case into the East and West churches.
At this time, the city also was home to houses of the Carmelites (Whitefriars) and Franciscans (Greyfriars), the latter of which surviving in modified form as the chapel of Marischal College as late as the early 20th century.

St Machar's Cathedral was built twenty years after David I (1124–1153) transferred the pre-Reformation Diocese from Mortlach in Banffshire to Old Aberdeen in 1137.
With the exception of the episcopate of William Elphinstone (1484–1511), building progressed slowly.
Gavin Dunbar, who followed him in 1518, completed the structure by adding the two western spires and the southern transept.
It is now a congregation of the Church of Scotland.
Aberdeen has two other cathedrals: St. Mary's Cathedral is a Roman Catholic cathedral in Gothic style, erected in 1859.
In addition, St. Andrew's Cathedral serves the Scottish Episcopal Church.
It was constructed in 1817 as Archibald Simpson's first commission and contains a memorial to the consecration of the first bishop of the Episcopal Church in the United States of America, which took place nearby.
In 1804, St Peter's Church, the first permanent Roman Catholic church in the city after the Reformation was built.

Numerous other Protestant denominations have a presence in Aberdeen.
The Salvation Army citadel on the Castlegate dominates the view of east end of Union Street.
In addition, there is a Unitarian church, established in 1833 and located in Skene Terrace.
Christadelphians have been present in Aberdeen since at least 1844.
Over the years, they have rented space to meet at a number of locations and currently meet in the Inchgarth Community Centre in Garthdee.
There is also a Quaker meetinghouse on Crown street, the only purpose built Quaker House in Scotland that is still in use today.
In addition, there are a number of Baptist congregations in the city, and Evangelical congregations have been appearing in significant numbers since the late 2000s.
The city also has two meetinghouses of The Church of Jesus Christ of Latter-day Saints (LDS Church).

There is also a mosque in Old Aberdeen which serves the Islamic community in the city, and an Orthodox Jewish Synagogue established in 1945.
There is also a Thai Buddhist temple located in the Hazelhead area of the city.
There are no formal Hindu buildings, although the University of Aberdeen has a small Bahá'í society and there is a fortnightly Hindu religious gathering in the 1st and 3rd Sunday afternoons at Queens Cross Parish church hall.
Christianity is the main religion practised in the city. Aberdeen's largest denominations are the Church of Scotland (through the Presbytery of Aberdeen) and the Roman Catholic Church, both with numerous churches across the city, with the Scottish Episcopal Church having the third-largest number. The most recent census in 2001 showed that Aberdeen has the highest proportion of non-religious residents of any city in Scotland, with nearly 43% of citizens claiming to have no religion and several former churches in the city have been converted into bars and restaurants. In the Middle Ages, the Kirk of St Nicholas was the only burgh kirk and one of Scotland's largest parish churches. Like a number of other Scottish kirks, it was subdivided after the Reformation, in this case into the East and West churches. At this time, the city also was home to houses of the Carmelites (Whitefriars) and Franciscans (Greyfriars), the latter of which surviving in modified form as the chapel of Marischal College as late as the early 20th century.
St Machar's Cathedral was built twenty years after David I (1124–1153) transferred the pre-Reformation Diocese from Mortlach in Banffshire to Old Aberdeen in 1137. With the exception of the episcopate of William Elphinstone (1484–1511), building progressed slowly. Gavin Dunbar, who followed him in 1518, completed the structure by adding the two western spires and the southern transept. It is now a congregation of the Church of Scotland. Aberdeen has two other cathedrals: St. Mary's Cathedral is a Roman Catholic cathedral in Gothic style, erected in 1859. In addition, St. Andrew's Cathedral serves the Scottish Episcopal Church. It was constructed in 1817 as Archibald Simpson's first commission and contains a memorial to the consecration of the first bishop of the Episcopal Church in the United States of America, which took place nearby. In 1804, St Peter's Church, the first permanent Roman Catholic church in the city after the Reformation was built.
Numerous other Protestant denominations have a presence in Aberdeen. The Salvation Army citadel on the Castlegate dominates the view of east end of Union Street. In addition, there is a Unitarian church, established in 1833 and located in Skene Terrace. Christadelphians have been present in Aberdeen since at least 1844. Over the years, they have rented space to meet at a number of locations and currently meet in the Inchgarth Community Centre in Garthdee. There is also a Quaker meetinghouse on Crown street, the only purpose built Quaker House in Scotland that is still in use today. In addition, there are a number of Baptist congregations in the city, and Evangelical congregations have been appearing in significant numbers since the late 2000s. The city also has two meetinghouses of The Church of Jesus Christ of Latter-day Saints (LDS Church).
There is also a mosque in Old Aberdeen which serves the Islamic community in the city, and an Orthodox Jewish Synagogue established in 1945. There is also a Thai Buddhist temple located in the Hazelhead area of the city. There are no formal Hindu buildings, although the University of Aberdeen has a small Bahá'í society and there is a fortnightly Hindu religious gathering in the 1st and 3rd Sunday afternoons at Queens Cross Parish church hall.
Aberdeen