List of religious leaders in 1820
1819 religious leaders - Events of 1820 - 1821 religious leaders - Religious leaders by year
See also: List of state leaders in 1820
Buddhism
- Tibetan Buddhism - Tsultrim Gyatso, Dalai Lama (1816-1837)
Christianity
- Church of England - Charles Manners-Sutton, Archbishop of Canterbury (1805-1828)
- Coptic Orthodox Church - Peter VII, Coptic Pope (1810-1854)
- Maronite Catholic Church - John Helou, Maronite Patriarch (1808-1823)
- Roman Catholic Church - Pius VII, Pope (1800-1823)
- Sovereign Military Order of Malta - André Di Giovanni, Grand Master of the Order (1814-1821)
- Teutonic Knights - Anton Viktor of Austria, Grand Master of the Order (1804-1835)
Islam