St. Olaf's Church, or variants thereof, refers to churches dedicated to Olaf II of Norway, and may refer to:

Denmark

• St. Olaf's Church, Helsingør, (Danish: Sankt Olai Kirke)
• Sankt Ols Kirke, Bornholm

Estonia

• St. Olaf's Church, Tallinn (Estonian: Oleviste kirik)
• St. Olaf's Church, Nõva (Estonian: Püha Olevi kirik)
• St. Olaf's Church, Vormsi (Estonian: Olavi kirik)
• St. Olaf's Church ruins, Väike-Pakri (Estonian: Püha Olavi kirik)
• St. Olaf's Chapel ruins in Suur-Pakri (Estonian: Olavi kabel)

Finland

• St. Olaf's Church, Jomala, Åland Islands (Finnish: Pyhän Olavin kirkko)
• St. Olaf's Church, Jyväskylä (Finnish: Pyhän Olavin kirkko)
• St. Olaf's Church, Tyrvää, Sastamala (Finnish: Pyhän Olavin kirkko)
• St. Olaf's Church, Ulvila (Finnish: Olavin kirkko)

Norway

• St. Olaf's Church, Balestrand

Russia

• Saint Olaf's Church in Novgorod

United Kingdom

• St Olaf's Church, Poughill, Bude, Cornwall
• St Olaf's Church, Wasdale, Cumbria
• St Olaf's Church (Balliasta), Unst, Shetland
• St Olaf's Church (Cruden), Cruden, Scotland
• St Olaf's Church (Lunda Wick), Unst, Shetland
• St Olaf's Church (Voe), Shetland Mainland

United States

• St. Olaf Kirke, a historical Lutheran church located near Cranfills Gap, Texas

See also

• St. Olave's Church