Popes with the longest reigns in history

Saint Peter (30– 67): 37 years, 1 month, and 15 days (13,560 days).

Blessed Pope Pius IX (1846–1878):31 years, 7 months and 23 days (11,560 days).

Pope Saint John Paul II (1978–2005): 26 years, 5 months and 18 days (9,665 days).

Pope Leo XIII (1878–1903): 25 years, 5 months and 1 day (9,281 days).

Pope Pius VI (1775–1799): 24 years, 6 months and 15 days (8,962 days).

Pope Adrian I (772–795): 23 years, 10 months and 25 days (8,729 days).

Servant of God Pope Pius VII (1800–1823): 23 years, 5 months and 7 days (8,560 days).

Pope Alexander III (1159–1181): 21 years, 11 months and 24 days (8,029 days).

Pope Saint Sylvester I (314–335): 21 years, 11 months and 1 day (8,005 days).

Pope Saint Leo I (440–461): 21 years, 1 month, and 13 days. (7,713 days).

Urban VIII (1623–1644): 20 years, 11 months and 24 days (7,664 days).