Family name Kossek (Kossek 
, Коссек 
) , throughout the world, is a rare cognomen. The cognomen Kossek is habitual in Poland, where it is a rare surname, Estonia, and Germany. In absolute terms, this name is the most popular in Germany, Poland, and the United States. Likewise, Kossek is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kossek | Austria, Germany, France, Poland, United States |
| Коссек | Russia, Ukraine |
| josef kossek Czech painter and watchmaker (1780-1858), CZ (b. 1780) |
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arvid kossek gymnast, DE |
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| jerzy kossek Polish historian, PL (b. 1961) |
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| ellen ernst kossek American academic and social scientist |
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| jerzy george kossek Polish educator |
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