Which coffee chain has a green mermaid in its logo?

The coffee chain with a green mermaid in its logo is Starbucks.

More precisely, Starbucks uses a green, double-tailed figure called a siren. The design was inspired by maritime imagery and reflects the company’s early Seattle setting, while the name Starbucks itself came from the character Starbuck in Herman Melville’s novel Moby-Dick.

The first Starbucks opened in Seattle in 1971, founded by Jerry Baldwin, Zev Siegl, and Gordon Bowker. Its original business focused on selling roasted coffee beans and equipment rather than serving the espresso drinks associated with the chain today.

The logo has changed several times. The early brown version showed more of the figure, while later versions simplified and cropped the image. In 2011, Starbucks removed the surrounding wordmark and enlarged the green siren. The figure is often casually called a mermaid, but Starbucks identifies her as a siren.