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September 7, 2026 Please be advised that all Mainstreet branches and staffed services will be closed on Monday, September 7, 2026 for Labour Day. We will see you back in the branch on Tuesday!
Mainstreet Credit Union is pleased to announce the opening of its new full-service branch in Petrolia, located at 4128 Petrolia Line. The new location officially opens to members on June 23, 2025, bringing a full suite of financial services and enhanced convenience to the growing Petrolia community.
Mainstreet Credit Union is pleased to announce the re-opening of its London Road branch in Sarnia on September 9, 2024. The branch, located at 1295 London Road, has undergone extensive renovations to create a modern and welcoming environment that will better serve members' needs.
Today, Mainstreet Credit Union held a groundbreaking ceremony to mark the start of construction of a new full-service branch at 4128 Petrolia Line. The event was attended by Mainstreet's Executive Leadership team and community figures celebrate Mainstreet’s permanent home in the community.