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Both Roger Williams and John Clarke, his compatriot and coworker for religious freedom, are variously credited as founding the earliest Baptist church in North America. In 1639, Williams established a Baptist church in Providence, Rhode Island, and Clarke began a Baptist church in Newport, Rhode Island. According to a Baptist historian who has researched the matter extensively, "There is much debate over the centuries as to whether the Providence or Newport church deserved the place of 'first' Baptist congregation in America. Exact records for both congregations are lacking."

Where did Roger Williams establish a Baptist church?
Providence, Rhode Island