Synagogues may be considered "oldest" based on different criteria such as oldest surviving building or oldest congregation. Some older synagogue buildings have been in continuous use as synagogues, while others have been converted to other purposes, and a few, such as the Touro Synagogue, were shuttered for many decades. Some early established congregations have been in continuous existence, while other early congregations have ceased to exist.

Oldest congregations

Sephardi congregations

All of the oldest congregations in the new world were founded by Sephardi Jews and followed the Sephardic liturgy.

Ashkenazi congregations

Until 1795, all documented congregations in the United States followed the Sephardic minhag. However, many included Ashkenazi members as well.

Oldest existing buildings

This list includes only buildings originally built as synagogues that are still standing. Some continue in use as Jewish houses of worship; others have been adaptively reused. Fewer than 100 purpose-built synagogues constructed prior to 1900 remain standing. A portion of these are highlighted below.

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