Home › Venues › Sullivan Mahoney Courthouse Theatre Sullivan Mahoney Courthouse Theatre Tickets Buy tickets for concerts at Sullivan Mahoney Courthouse Theatre in St. Catharines, ON. No Upcoming Events No upcoming events scheduled at Sullivan Mahoney Courthouse Theatre. Please contact us with any corrections. Hotels & Lodging Near Sullivan Mahoney Courthouse Theatre About the Venue Sullivan Mahoney Courthouse Theatre At-a-Glance Address101 King Street, 2nd FloorSt. Catharines, Ontario L2R 3H6Canada Map & Directions Advertisement