St. Nicholas Cathedral, or variations on the name, may refer to buildings dedicated to Saint Nicholas in the following places:

• St Nicholas Russian Orthodox Cathedral, Brisbane, Queensland

• Feldkirch Cathedral

• Saint Nicolas Cathedral, Famagusta, now Lala Mustafa Pasha Mosque

• Cathedral of St Nicholas, České Budějovice

• Garðar Cathedral Ruins, Igaliku, Greenland

• Haapsalu Castle and cathedral

• St Nicolas Church, the former name until 1917 of the Finnish Evangelical Lutheran Helsinki Cathedral
• Saint Nicholas Cathedral, Kuopio

• Russian Orthodox Cathedral, Nice

• Cathedral of Our Lady Assumed into Heaven and St Nicholas, Galway

• Palmi Cathedral
• Sassari Cathedral

• St. Nicholas Cathedral (Almaty)

• St. Nicholas Naval Cathedral, Karosta

• Saint Nicholas Cathedral, Monaco

• St. Nicholas Cathedral, Tumbes, Peru
• Cathedral of St. Nicholas, Caracas, Venezuela, an Eastern Orthodox church serving the Russian-Venezuelan community

• Orthodox Cathedral of St. Nicholas, Białystok
• Cathedral of St. Nicholas, Bielsko-Biała
• Bydgoszcz Cathedral
• St. Nicholas Cathedral, Elbląg
• Cathedral of St. Nicholas the Bishop in Kalisz
• Łowicz Cathedral

• St. Andrew and St. Nicholas Orthodox Cathedral, Galați
• St. Nicholas Cathedral, Oradea
• Cathedral of Saint Nicholas, Râmnicu Vâlcea, the seat of the archdiocese of Râmnic
• St. Nicholas Cathedral, Tulcea

• Saint Nicholas Cathedral, Novgorod
• Kronstadt Naval Cathedral, Saint Petersburg
• St. Nicholas Naval Cathedral, Saint Petersburg

• St. Nicholas Cathedral, Ruski Krstur
• Sremski Karlovci Orthodox Cathedral

• Co-Cathedral of Saint Nicholas, Prešov

• Ljubljana Cathedral
• Murska Sobota Cathedral
• Novo Mesto Cathedral

• St. Nicholas Cathedral (Seoul)

• Concatedral de San Nicolás, Alicante

• Fribourg Cathedral

• St. Nicholas Cathedral (Dushanbe)

• St. Nicholas Military Cathedral in Kyiv
• St. Nicholas Cathedral, Nizhyn

• Newcastle Cathedral

• St. Nicholas Greek Orthodox Cathedral (Tarpon Springs, Florida)
• St. Nicholas Cathedral (Chicago), Illinois
• St. Nicholas Russian Orthodox Cathedral, New York City
• Saint Nicholas Greek Orthodox Cathedral (Pittsburgh), Pennsylvania
• St. Nicholas Cathedral (Washington, D.C.)
• Saint Nicholas Russian Orthodox Cathedral (Seattle), a Seattle landmark, Washington

• St. Nicholas Cathedral, Da Lat

• Saint Nicholas's Church (disambiguation)
• Basilica of Saint Nicholas (disambiguation)