Cornwall
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- Co-Cathedral of the Nativity of the Blessed Virgin MaryCatholic (Latin rite) · Cathedral
- St. Columban ChurchCatholic (Latin rite) · House of prayer · 42 Fifth Street West
- Evangelical Christian Spiritual ChurchChurch · 305 Thirteenth Street WestSunday 10:00
- Blessed Sacrement ParishCatholic (Latin rite) · House of prayer · 321 Tollgate Road East
- Calvary Baptist ChurchBaptist · Church
- Christ Church SeawayAnglican · Church
- Church of ChristChurch
- Clyde River Presbyterian ChurchReformed and Presbyterian · House of prayer
- Cornwall Seventh Day Adventist ChurchAdventist · Church
- Cornwall Wesleyan ChurchMethodist and Holiness · House of prayer
- Faith Apostolic ChurchPentecostal and Charismatic · Church
- Fellowship Baptist ChurchBaptist · Church
- First Baptist ChurchBaptist · Church · 310 York Street
- Fountaingate Christian AssemblyHouse of prayer
- Harvest Christian FellowshipChurch
- Immanuel Christian Reformed ChurchReformed and Presbyterian · Church
- Kingdom Hall of Jehovah's WitnessesHouse of prayer
- Knox-St. Paul's United ChurchChurch
- Lifecentre CornwallChurch
- Long Sault Pentecostal ChurchPentecostal and Charismatic · Church
- Paroisse Sainte-Thérèse-de-LisieuxCatholic (Latin rite) · Church · 1304 Lisieux Street
- Precious Blood Catholic ChurchCatholic (Latin rite) · Church
- Salem United ChurchHouse of prayer
- St. Andrews Catholic ChurchCatholic (Latin rite) · House of prayer
- St. Andrews PresbyterianReformed and Presbyterian · House of prayer
- St. Andrew's Presbyterian ChurchReformed and Presbyterian · Church
- St Andrew's - St Mark's United ChurchChurch · 20 Johnson Crescent
- St. Andrew's United ChurchChurch
- St Felix De Valois ChurchCatholic (Latin rite) · House of prayer
- St. Francis de Sales Catholic ChurchCatholic (Latin rite) · Church · 434 Second Street West
- St. John's Presbyterian ChurchReformed and Presbyterian · Church
- St. Mary's Catholic ChurchCatholic (Latin rite) · Church
- St. Matthew's Lutheran ChurchLutheran · Church · 1509 Second Street West
- St. Peter's Catholic ChurchCatholic (Latin rite) · Church
- St. Pius X Roman Catholic ChurchCatholic (Latin rite) · Church
- St. William Catholic ChurchCatholic (Latin rite) · Church
- The Church of Jesus Christ of Latter-day SaintsOther restorationist · Church · 500 Cornwall Centre Road
- Trinity Anglican ChurchAnglican · Church
- West River United ChurchHouse of prayer · 10 Church Street