Cognomen Koelsch (Koelsch 
) , globally, is quite a rare last name. The surname Koelsch is habitual in Western Europe, particularly Germany, where it is quite a rare surname, Austria, where it is a rare surname, and France. In absolute terms, it most frequently occurs in the United States, Germany, and France.
| VARIANT | COUNTRY |
|---|---|
| Koelsch | United States, Germany, France, Austria, Indonesia |
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john kelvin koelsch United States Navy Medal of Honor recipient (1923-1951), US (b. 1923) |
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| franz koelsch German physician, DE (b. 1876) |
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| adolf koelsch Swiss writer (1879-1948), CH (b. 1879) |
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| c. frederick koelsch American chemist (1907-1999), US (b. 1907) |
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| kurt august koelsch German surgeon, DE (b. 1910) |
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| josy koelsch French canoeist, FR (b. 1926) |
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| gilbert koelsch chess player (b. 1966) |
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| michael koelsch American illustrator, US (b. 1967) |
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| stefan koelsch music cognition researcher, US (b. 1968) |
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| valerie koelsch (b. 1962) |
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| stefan koelsch (b. 1968) |
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| laurel koelsch |
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