Mariners' Church, Church building in The Rocks, Sydney, Australia.

Mariners' Church is located at 98-100 George Street in The Rocks and features traditional architectural design with a spacious interior. The building was originally constructed to serve religious gatherings and maritime community needs.

The building was designed between 1856 and 1859 by architects J. Bibb, H. C. Kent, and the firm Kent & Massie. This period established its role as a religious institution serving the maritime community of Sydney.

The building served as a spiritual and educational hub for sailors through the Bethel Seamen's Union, which operated from 1822 onward. This connection made it a vital gathering place for those working at sea and shaped community life in The Rocks.

The building stands at 98–100 George Street, where the George Street facade faces the street and the Bethel Steps run along the south side. A viewing window cut into the wall at the Bethel Stairs shows the excavated remains of Bethel Street in the basement. The site sits within The Rocks, a short walk from Circular Quay.

The building has transformed over time from a purely religious institution into a multipurpose venue. Today it houses commercial establishments, dining options, and entertainment spaces within its historic walls.