Is Mormonism an ethnic group

Answer 1

No. Mormonism is a Restorationist Christian religious movement. Followers of Mormonism come from many different ethnic groups around the world.

It is true that some religious groups can double as ethnic groups (such as Judaism - although you can be an ethnic Jew but not a religious Jew, or religiously Jewish but not ethnically Jewish) but Mormonism has not had the thousands of years of intermarrying required to become an ethnic group.