Surname Deuser (Deuser 
) , in all the world, is a rare last name. The surname Deuser is habitual in Germany, where it is a rare surname, Slovakia, and Czechia. Not in comparison with a country's population, the name is most common in Germany, the United States, and Slovakia. Much less frequently, Deuser is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Deuser | Germany, Switzerland, Slovakia, United States, Czechia |
| wilhelm deuser DE (b. 1861) |
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| erich deuser German physiotherapist, DE (b. 1910) |
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klaus-jürgen deuser German presenter and comedian, DE (b. 1962) |
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| hermann deuser German theologian and university professor, DE (b. 1946) |
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| greg deuser college basketball player (1978–1982) Louisville |
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