Costco introduced the Kirkland Signature private-label brand in 1995.
The brand was named after Kirkland, Washington, where Costco had its headquarters at the time. Costco uses private-label products to offer goods under its own identity, covering categories such as food, clothing, household supplies, appliances, and personal care.
Kirkland Signature is not a separate retail chain; it is Costco’s store brand. The label became one of the company’s most recognizable product identities and is sold primarily through Costco warehouses and its online business. The name is sometimes confused with Costco’s corporate name because packaging prominently displays both the Kirkland Signature label and Costco branding.