Cognomen Koch (Koch 
, كوخ 
, 科克 
, among others...) , worldwide, is a widespread family name. The last name Koch is habitual in Western Europe, particularly Germany, where it is a common surname, Switzerland, and Austria, where it is quite a common surname (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in Germany, India, and the United States. Much less frequently, Koch is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Koch | Brazil, Switzerland, India, United States, Germany |
| كوخ | Iraq, Jordan, Sudan |
| 科克 | China |
| Кох | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Коч | Kazakhstan, Russia, Kyrgyzstan, Armenia, Ukraine |
| קוך | Israel |
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konrad koch German theologian, DE (b. 1460) |
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| margarete koch DE (b. 1450) |
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| ulrich koch CH (b. 1525) |
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| barnabas koch (b. 1529) |
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| johann koch (b. 1540) |
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| hans heinrich koch CH (b. 1550) |
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| hans conrad koch (1564-1643), CH (b. 1564) |
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| daniel koch (b. 1555) |
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| maria koch (b. 1557) |
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| thomas koch notary, DE (b. 1568) |
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| conrad koch (b. 1561) |
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| michael koch DE (b. 1563) |
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johannes koch von gailenbach DE (b. 1614) |
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| ludwig koch ; Ludwig Koch was painter, glass painter, draftsman born on 1577-07-31 in Bern (Switzerland), CH (b. 1577) |
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| hans koch DE (b. 1579) |
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