List of largest church buildings

can be measured and compared in several ways. These include area, volume, length, width, height, or capacity. Several churches individually claim to be "the largest church", which may be due to any one of these criteria.

Criteria for inclusion

The reason the edifice was built was for Christian religious services
* Entries are included even if they currently do not function as a church. For example, the Hagia Sophia is included; it was originally built as a church but currently operates as a mosque.
* Buildings that were not originally constructed as churches are generally not included; for example, the Lakewood Church building, which was initially built as the Lakewood Church [Central Campus|Compaq Center]. An exception is made for buildings that have been substantially modified for use as a church; for example, the Mosque–Cathedral of Córdoba.
The building must still be standing.
The building has a known floor area of more than.
* Internal floor area is measured to the internal face of the external walls.
* External floor area is measured to the external face of the external walls.
* A reliable source is present that states the building's area.
Not a shrine, tabernacle, temple, or any other structure that functions separately from a church.