Triglops sculpins are widspread in northern seas. In the Pacific Ocean they occur from the Sea of Japan and Sea of Okhotsk east into the Bering Sea, the Aleutian Islands the Gulf of Alaska south to Puget Sound. In the Arctic they are found from the Chuckchi and Beaufort Seas east to the Queen Elizabeth Islands and Hudson Bay and into the Atlantic south as far as Scotland and east to the Barents Sea, Kara Sea and Laptev Sea. They are benthic fishes which are found over varied substrates including rock, gravel, mud or sand at depths varying from the surface down to , although they are commonest between .
