Coos

Coos could refer to:

In Oregon

• Coos people, an indigenous people of the Northwest Plateau in Oregon
  • Confederated Tribes of Coos, Lower Umpqua and Siuslaw Indians, a federally recognized tribe of Coos people
• Coos Bay, an inlet on the coast of Oregon
• Coos Bay, Oregon, a small city on Coos Bay
• Coos County, Oregon, a county in Oregon
• Coos language, the language of the Pacific Coos people
• Coos River, a river in Oregon

In New Hampshire

• Coos (Abenaki tribe), a Native American tribe from New England
• Coos County, New Hampshire, a county in the U.S. state of New Hampshire
• Coos, New Hampshire, historic frontier region in the upper Connecticut River valley

Elsewhere

• Kos, an island SW of Asia Minor