DOK or Dok may refer to:
* Danube–Oder Canal, a planned and partially constructed artificial waterway in eastern Europe
* DOK, code for Donetsk International Airport
* Dok (fortress), an ancient fortification on the Mount of Temptation near Jericho
* DOK (TV series), a Swiss documentary television series
* Dok Leipzig, a documentary festival in Leipzig, Germany
* John Hager (cartoonist) (1858-1932), cartoonist, known as "Dok"
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