Family name Косинский (Kossinski 
, Косинский 
, Kosinsky 
, among others...) , all around the world, is quite a rare last name. The cognomen Косинский is characteristic of Belarus, where it is quite a rare surname, Russia, where it is a rare surname, and Kazakhstan. Measured by absolute frequency, it is commonest in Russia, Belarus, and Germany. Much less frequently, Косинский is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kossinski | United Kingdom, Poland, Brazil, Germany, Switzerland |
| Косинский | Belarus, Ukraine, Kazakhstan, Russia |
| Kosinsky | Israel, Canada, Argentina, Germany, United States |
| Kosinskij | Belarus |
| Kosinskiy | Ukraine, United States, Estonia, Russia |
Kosinski, Kosinskii, Kosiński, Kosynskyi, Kozinski, Kozynskyi, Козинський, and Косинський
| косинский, владимир андреевич Ukrainian and Russian economist (1864–1938), UA (b. 1864) |
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| константин константинович косинский Russian botanist (1874-1928), RU (b. 1874) |
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| михаил фёдорович косинский RU (b. 1904) |
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| косинский, лев афанасьевич UA (b. 1909) |
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| андрей станиславович косинский RU (b. 1929) |
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| владимир иванович косинский swimmer, RU (b. 1945) |
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| косинский, андрей юрьевич RU (b. 1957) |
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| косинский, дмитрий владимирович Ukrainian javelin thrower, UA (b. 1989) |
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Ян, Даниил, Никита, Валера, Виктор, Леонид, Сергей, Степан, Руслан, Филипп, Эдуард, Эрнест, Алексей, Анзельм, Георгий, Даниэль, Дмитрий, Николай, Валерий, Василий, Виталий, Владимр, Андрей, Михаил, Максим, Кирилл, Юра, Марк, Глеб, Паша, Петр, Дима, Влад, Олег, Илья, Иван, Евгений, Саша, Антон, Артем, Артур, Борис, Павел, Денис, Вадим, Игорь, Семен, Роман, Юрий, and Ярослав