Family name Wietz (Wietz 
) , in the world, is a rare last name. The surname Wietz is habitual in Denmark, where it is a rare surname, Germany, and Argentina, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Germany, the United States, and Argentina. Also, Wietz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Wietz | United States, Argentina, Denmark, Germany, South Africa |
| j. k. wietz (b. 1791) |
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| j. k. wietz (b. 1821) |
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| viliam wietz CZ (b. 1839) |
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| helmut wietz German film producer, director, and screenwriter, DE (b. 1945) |
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| matthias wietz researcher |
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| karoline holte hedelund wietz Danish association football player |
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| vinzenz wietz |
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