Koski may refer to
;Villages in Poland
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Brulino-Koski
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Długołęka-Koski
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Humięcino-Koski
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Koski Duże
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Koski Pierwsze
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Koski-Wypychy
;Municipalities in Finland
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Hämeenkoski
Hämeenkoski (; Koski Hl until 1995, see Koski Tl) is a former municipality of Finland. It was merged to the municipality of Hollola on 1 January 2016.
It is located in the province of Southern Finland and is part of the Päijänne Tavastia reg ...
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Koski Tl
Koski Tl (; sv, Koskis) is a municipality of Finland.
It is located in the Southwest Finland region and was part of the former province of Western Finland. The municipality has a population of () and covers an area of of which is water. The po ...
;Other
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Koski (surname)
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Koski Glacier in Antarctica
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