Cognomen Koçak (Kocak 
, Koçak 
) , around the globe, is a widespread surname. The surname Koçak is characteristic of Turkey, where it is a common surname, Cyprus, where it is quite a rare surname, and Austria. Not in comparison with a country's population, this name is the most popular in Turkey, Germany, and Indonesia.
| VARIANT | COUNTRY |
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| Kocak | Turkey, France, United States, Indonesia, Germany |
| Koçak | Turkey, France, Austria, United States, Germany |
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şükrü koçak Turkish politician, TR (b. 1886) |
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| sait koçak TR (b. 1908) |
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| yunus koçak Turkish politician, TR (b. 1918) |
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selahattin koçak Belgian politician, BE (b. 1969) |
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| ahmet koçak TR (b. 1913) |
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| ekrem koçak Olympic athlete (1931-1993), TR (b. 1931) |
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adem koçak Turkish footballer, TR (b. 1983) |
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| fikret koçak TR (b. 1925) |
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ferat koçak DE (b. 1979) |
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| nur koçak Turkish painter (born 1941), TR (b. 1941) |
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| ersin koçak Turkish politician, TR (b. 1945) |
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| ahmet ömer koçak Turkish entomologist (1947–2020), TR (b. 1947) |
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| orhan koçak Turkish author, TR (b. 1949) |
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| ümmiye koçak actress and fictional film director, TR (b. 1957) |
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| hüzeyme koçak Turkish author, TR (b. 1958) |
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