Surname Helmstetter (Helmstetter 
) , across the world, is quite a rare family name. The surname Helmstetter is characteristic of France, where it is a rare surname, Germany, and the United States.
| VARIANT | COUNTRY |
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| Helmstetter | Switzerland, France, United States, United Kingdom, Germany |
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pisla helmstetter French writer, FR (b. 1926) |
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| rudolf helmstetter DE (b. 1961) |
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| andrew j helmstetter researcher ORCID ID = 0000-0003-3761-4981 |
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| fred j helmstetter researcher ORCID ID = 0000-0003-3413-2418 |
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| agnès helmstetter FR (b. 1976) |
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