Coos may refer to:
People Cowasuck, also known as Cowass or Coös, an Algonquian-speaking Native American tribe in northeastern North America Coos people, an Indigenous people of the Northwest Plateau in Oregon Confederated Tribes of Coos, Lower Umpqua and Siuslaw Indians, federally recognized tribe of Coos people
Places Inhabited places in the United States Coös County, New Hampshire Coos Bay, Oregon, a small city on Coos Bay Coos County, Oregon
Landforms Coos Bay, an inlet of the Pacific Ocean Coos River, southwest Oregon
Languages Coosan languages, sometimes called Coos or Kusan, a language family formerly spoken on the southern Oregon coast Coos, another name for the Hanis language, one of the two extinct Coosan languages of the southern Oregon coast
See also Coosa (disambiguation) Kos, an island southwest of Asia Minor