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- St. John the Baptist Skete (Kentlyn, Australia)
- St. John the Baptist Skete (Kentlyn, New South Wales)
- St. John the Theologian
- St. Jonah of Manchuria
- St. Kingsmark
- St. Makary Hermitage (Kazan)
- St. Mary Church (Two River, Minnesota)
- St. Michael Skete (Canones, New Mexico)
- St. Mina Monastery (Mariut, Egypt)
- St. Moses the Black
- St. Nektarios Greek Orthodox Monastery (Roscoe, New York)
- St. Nicholas Anapafsas Monastery (Meteora)
- St. Nicholas Cathedral (New York, New York)
- St. Nicholas Cathedral (Washington, D.C.)
- St. Nicholas Chapel (Biorka, Alaska)
- St. Nicholas Church (Appleton, Wisconsin)
- St. Nicholas Church (Kenosha, Wisconsin)
- St. Nicholas Greek Orthodox Church (New York City, New York)
- St. Nicholas Monastery (Andros)
- St. Nicholas Monastery (Andros, Greece)
- St. Nicholas Orthodox Church (Mogadore, Ohio)
- St. Nikola Church (Cudahy, Wisconsin)
- St. Nilus Island Skete
- St. Paisius Serbian Orthodox Monastery (Safford, Arizona)
- St. Panteleimon's Monastery (Athos)
- St. Panteleimon Monastery Fathers (Athos)
- St. Paul's Monastery (Athos)
- St. Paul's Theological Course of Studies
- St. Paul Skete (Grand Junction, Tennessee)
- St. Peter and St. Paul Orthodox Church (Burr Ridge, Illinois)
- St. Petersburg Theological Academy
- St. Petroc Monastery (Cascades, Tasmania)
- St. Platon's Orthodox Theological Seminary (Tenafly, New Jersey)
- St. Sabbas the Sanctified Monastery (Harper Woods, Michigan)
- St. Sava's Serbian Orthodox Seminary (Libertyville, Illinois)
- St. Sava Cathedral (New York, New York)
- St. Sava Cathedral (New York City , New York)
- St. Sava Church (Douglas, Alaska)
- St. Sava Church (Jackson, California)
- St. Sava School (Milwaukee, Wisconsin)
- St. Sava Serbian Orthodox Church (Farrer, Australian Capital Territory)
- St. Sergius Orthodox Theological Institute (Paris, France)
- St. Simon Church (Ironwood, Michigan)
- St. Sophia
- St. Sophia Cathedral (Harbin, China)
- St. Sophia Cathedral (Los Angeles, California)
- St. Sophia Cathedral (Novgorod)
- St. Sophia Ukrainian Orthodox Theological Seminary (South Bound Brook, New Jersey)
- St. Stephen's Course in Orthodox Theology
- St. Stephen Monastery (Meteora)
- St. Theodore House (Galion, Ohio)
- St. Tikhon's Orthodox Monastery (South Canaan, Pennsylvania)
- St. Tikhon's Orthodox Theological Seminary
- St. Tikhon's Orthodox Theological Seminary (South Canaan, Pennsylvania)
- St. Vladimir's Camp, Farmingdale, OH
- St. Vladimir's Camp (Farmdale, Ohio)
- St. Vladimir's Camp (Farmingdale, Ohio)
- St. Vladimir's Orthodox Theological Seminary
- St. Vladimir's Orthodox Theological Seminary (Crestwood, New York)
- St. Vladimir’s Memorial Church (Jackson)
- St. Vladimir’s Memorial Church (Jackson, New Jersey)
- St. Volodymyr's Ukrainian Orthodox Cathedral (Toronto, Ontario)
- St Alexei Mechev
- St Andrew's Greek Orthodox Theological College (Sydney, Australia)
- St George Serbian Orthodox Church (Forrest, Australian Capital Territory)
- St Moses the Black
- St Nicholas Anapafsas Monastery (Meteora)
- St Nicholas Hoonah Alaska
- St Nicholas of Japan
- St Paul's Theological Course of Studies
- St Peter and St Paul Orthodox Church (Burr Ridge, IL)
- St Sava Farrer
- St Sava Serbian Orthodox Church (Farrer, Australia)
- St Sava Serbian Orthodox Church (Farrer, Australian Capital Territory)
- St Sophia
- St Sophia Cathedral (Kiev)
- St Sophia Cathedral (Los Angeles)
- St Stephen Monastery (Meteora)
- St Stephen the Great
- St Stephen the Great Charitable Trust
- St Theodore Trichinas
- Standard
- Standing Conference of Canonical Orthodox Bishops in America
- Standing Conference of Canonical Orthodox Churches in Australia
- Standing Conference of Canonical Orthodox Churches of Australia
- Standing Conference of the Canonical Orthodox Bishops in the Americas
- Stanley Harakas
- Stanley S. Harakas
- Starets
- Statistics of Orthodoxy in Australia
- Stavronikita Monastery (Athos)
- Stavropeghial
- Stavropegial
- Stavropegic
- Stavrophore
- Stavropighial
- Stavropigial
- Stay of Our Sorrows
- Stefan Buchiu
- Stefan Nemanja
- Stefan Uros III of Serbia
- Stefan Uros II Milutin
- Stefan Wu Zhiquan
- Stem cell research
- Stephanos (Charalambides) of Tallinn
- Stephanos (Charalambites) of Tallinn
- Stephanos (Daniilidis) of Lemnos
- Stephanos (Matakoulias) of Triphylia and Olympia
- Stephanos (Pantanassiotis)
- Stephanos of Khinolakkos
- Stephen (Dzubay) of Pittsburgh
- Stephen (Lasko) of Boston
- Stephen (Yavorsky) of Ryazan
- Stephen Godley
- Stephen III of Rome
- Stephen II of Rome
- Stephen IV of Rome
- Stephen I of Constantinople
- Stephen I of Rome
- Stephen Nemanja
- Stephen V of Rome
- Stephen Yavorsky
- Stephen of Perm
- Stephen of Sourozh
- Stephen the Great
- Stephen the New
- Steven Peter Tsichlis
- Sticharion
- Stichera
- Sticheron
- Stoglavy Sobor
- Stole
- Stowe Missal
- Sts Anikitos and Photios Holy Unmercenaries
- Stub
- Studenica
- Studenica Monastery
- Studion Monastery
- Style Manual
- Stylianos (Harkianakis) of Australia
- Stylianos of Paphlagonia
- Stylite
- Subdeacon
- Sucevita Monastery (Bucovina, Romania)
- Sudan
- Suffragan bishop
- Suggestions for future development
- Sunday
- Sunday of Myrrh-bearing Women
- Sunday of Orthodoxy
- Sunday of St. Gregory Palamas
- Sunday of St. John Climacus
- Sunday of St. Mary of Egypt
- Sunday of St. Thomas
- Sunday of the Fathers
- Sunday of the Fathers of the First Six Councils
- Sunday of the Fathers of the Seventh Ecumenical Council
- Sunday of the Forefathers
- Sunday of the Holy Cross
- Sunday of the Last Judgment
- Sunday of the Prodigal Son
- Sunday of the Publican and Pharisee
- Superior
- Supersessionism
- Suprasl Monastery
- Supraśl Monastery
- Surplice
- Susanna
- Susanna (disambiguation)
- Susanna the Myrrh-Bearer
- Susanna the Virgin
- Suspension
- Suzdalites
- Svetitskhoveli Cathedral (Mtskheta, Georgia)
- Sviatohirsk Lavra
- Sylvester (Haruns) of Montreal
- Sylvester (Holmsky) of Kazan
- Sylvester I of Rome
- Sylvester Syropoulos
- Sylvester of Alexandria
- Sylvester of Antioch
- Symbol of Faith
- Symbolism
- Symeon
- Symeon (Du) of Shanghai
- Symeon (disambiguation)
- Symeon I of Trebizond
- Symeon of Thessalonica
- Symeon of Trier
- Symeon the New Theologian
- Symeon the Stylite
- Symmachus of Rome
- Synagogue
- Synaxarion
- Synaxarium
- Synaxis
- Synaxis (disambiguation)
- Synaxis of All Saints of Siberia
- Synaxis of Monastic Fathers who are venerated in the Near Caves of St Anthony
- Synaxis of the Baptist
- Synaxis of the Hierarchs of Moscow
- Synaxis of the Martyrs of Butovo
- Synaxis of the Saints of Rostov
- Synaxis of those whose relics repose in the Far Caves of St Theodosius
- Syndesmos
- Synod
- Synod of Milan
- Synod of Ras-Baalbek
- Synod of Whitby
- Synod of the Oak
- Synoptic gospels
- Synthronon
- Syriac Orthodox Church
- Syro-Malankara Catholic Church
- Tabernacle
- Tabernacle (biblical)
- Tabernacle (liturgical)
- Table of oblation
- Table of preparation
- Taiwan
- Takla Haymanot of Ethiopia
- Tama
- Tamata
- Taper-bearer
- Tarasios (Anton) of Buenos Aires
- Tarasios of Constantinople
- Tarasius of Constantinople
- Tatiana of Rome
- Tatwine
- Taxiarchis
- Taxiarhis
- Te Deum
- Te deum
- Tekle Haimanot II
- Telemachus
- Temperance
- Temple
- Temple of Saint Sava
- Temple of Saint Sava (Belgrade)
- Ten Holy Martyrs of Crete
- Teoctist (Arapasu) of Romania