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

England St Olav's Norwegian Seamen's Church, London, the English name for Sjømannskirken, London St Olave's Church, Chester, Cheshire St Olave's Church, Exeter, Devon St Olave's Church, Gatcombe, Isle of Wight St Olave's Church, Hart Street, London St Olave's Church, Old Jewry, London St Olave's Church, Silver Street, London St Olave's Church, Southwark, London St Olave's Church, York, Yorkshire St Nicholas Olave, London

India St. Olav's Church, Serampore

Norway St. Olav's Church of Avaldsnes, the formal name for Avaldsnes Church St. Olav's Church (ruin) in Bamble, Telemark St. Olav's Church, Bergen, incorporated into the current Bergen Cathedral Eidsberg Church St. Olav's Cathedral, Oslo () Holy Olav Chapel, Stiklestad St. Olav's Cathedral, Trondheim ()

See also St. Olaf's Church