The Klamath are a Native American tribe of the Pacific Northwest.

A Klamath man in costume; a full image is available here.

Klamath is also the name of several places in the United States:

• Klamath County, Oregon
• Klamath County, California (a county which no longer exists)
• Klamath Falls, Oregon
• The Klamath Mountains
• The Klamath River

Klamath Falls is the county seat of Klamath County, which covers the central southernmost part of Oregon.

Klamath was the pre-release "code name" for Intel's Pentium II microprocessor.