| Name | Built | Area (m2) | Country | 
| St. Peter's Basilica | 1506–1626 | 15,160 (interior)
21,095 (exterior) | Vatican City | 
| Basilica of the National Shrine of Our Lady of Aparecida | 1955–1980 | 12,000 | Brazil | 
| Milan Cathedral | 1386–1965 | 11,700 (interior) | Italy | 
| Seville Cathedral | 1401–1528 | 11,520 | Spain | 
| Cathedral of Saint John the Divine | 1892–present | 11,200 | United States | 
| Abbey of Santa Giustina | 1501–1606 | 9,717 (interior) | Italy | 
| Basilica of Our Lady of Licheń | 1994–2004 | 10,090 | Poland | 
| Liverpool Cathedral | 1904–1978 | 9,687 | United Kingdom | 
| Church of the Most Holy Trinity | 2004-07 | 8,700 | Portugal | 
| Basilica of Saint Paul Outside the Walls | IV–1823 | 8,515 | Italy | 
| Basilica-Cathedral of Our Lady of the Pillar | 1681–1872 | 8,318 | Spain | 
| Florence Cathedral | 1296–1436 | 8,300 | Italy | 
| Ulm Minster | 1377–1890 | 8,260 (6,029 interior) | Germany | 
| Basilica of the Sacred Heart | 1905–70 | 8,000 | Belgium | 
| Basilica of Our Lady of Guadalupe | 1974–1976 | 8,167 | Mexico | 
| Cathedral of Our Lady | 1352–1521 | 8,000 | Belgium | 
| Rio de Janeiro Cathedral | 1964-1979 | 8,000 | Brazil | 
| Basilica of Our Lady of Peace | 1985–1990 | 7,989 (interior)
30,000 (exterior) | Ivory Coast | 
| Hagia Sophia | 532–537 | 7,960 | Turkey | 
| San Petronio Basilica | 1390–1479 | 7,920 | Italy | 
| Cologne Cathedral | 1248–1880 | 7,914 | Germany | 
| St Paul's Cathedral | 1677–1708 | 7,875 | United Kingdom | 
| Washington National Cathedral | 1907–1990 | 7,712 | United States | 
| Amiens Cathedral | 1220–70 | 7,700 | France | 
| Basilica of the National Shrine of the Immaculate Conception | 1919–61 | 7,097 (interior)
12,069 (exterior) | United States | 
| Cathedral of La Plata | 1884-1932 | 6,968 | Argentina | 
| Saint Joseph's Oratory | 1904–67 | 6,825 | Canada | 
| Mexico City Metropolitan Cathedral | 1573-1813 | 6,732 | Mexico | 
| Palma Cathedral | 1220-1346 | 6,655 | Spain | 
| Reims Cathedral | 1211–1275 | 6,650 | France | 
| Strasbourg Cathedral | 1015–1439 | 6,044 | France | 
| Cathedral of Our Lady of the Angels | 1998–2002 | 6,038 | United States | 
| De Hoeksteen, Barneveld | 2007–08 | 6,020 | Netherlands | 
| Padre Pio Pilgrimage Church | 1991-2004 | 6,000 | Italy | 
| Bourges Cathedral | 1195-1230 | 5,900 | France | 
| Esztergom Basilica | 1822–1869 | 5,660 | Hungary | 
| Notre Dame de Paris | 1163–1345 | 5,500 | France | 
| Sagrada Familia | 1882–present | 5,400 | Spain | 
| São Paulo Cathedral | 1913-1954 | 5,300 | Brazil | 
| Primate Cathedral of Bogotá | 1807-23 | 5,300 | Colombia | 
| Cathedral of Christ the Saviour | 1839–83 | 5,240 | Russia | 
| Chartres Cathedral | 1145-1220 | 5,200 | France | 
| New Cathedral, Linz | 1862–1924 | 5,170 | Austria | 
| Westminster Cathedral | 1895–1910 | 5,017 | United Kingdom | 
| St. Mary's Church | 1343–1502 | 5,000 | Poland | 
| Holy Trinity Cathedral | 1995–2004 | 5,000 | Georgia | 
| Winchester Cathedral | 1079–1525 | 4,968 | United Kingdom | 
| Dresden Cathedral | 1739-55 | 4,800 | Germany | 
| Basilica of St. Thérèse, Lisieux | 1929-54 | 4,500 | France | 
| Basilica de San Martin de Tours (Taal) | 1856–78 | 4,320 | Philippines | 
| Ely Cathedral, Cambridgeshire | 1083–1375 | 4,273 | United Kingdom | 
| Frauenkirche | 1468–1525 | 4,188 | Germany | 
| Cathedral Basilica of Saint Louis (St. Louis) | 1907-14 | 4,130 | United States | 
| Saint Isaac's Cathedral | 1818–58 | 4,000 | Russia | 
| Saint Gregory the Illuminator Cathedral, Yerevan | 1997–2001 | 3,822 | Armenia | 
| Church of Saint Sava | 1935–89 | 3,500 | Serbia | 
| Alexander Nevsky Cathedral | 1882–1912 | 3,170 | Bulgaria | 
| Westminster Abbey | 960-18c | 2,972 | United Kingdom | 
| Medak Cathedral | 1914–26 | 2,800 | India | 
| Our Lady of Dolours Syro-Malabar Catholic Basilica | 1929-2005 | 2,300 | India | 
| Basilica of St. John the Baptist | 1839–1855 | 2,135 | Canada | 
| Myeongdong Cathedral | 1892-1898 | 2,025 | Korea | 
| All Saints Cathedral, Halifax | 1907–1910 | 1,760 | Canada |