Frog Rock is a glacial erratic on Bainbridge Island, Washington. The frog shape is made of two stacked granite boulders, painted by a pair of local residents to resemble a frog on June 6, 1971. The pair of boulders were reportedly once a single boulder which was dynamited in the 1950s or earlier, in order to remove it from a road right-of-way. After the dynamiting, the rock was known as "Split Rock".

The rock is locally famous, known to be a humorous historic marker, and a notable visitor attraction. It is used by bicyclists as a regrouping point.

A local "resiliency forum" is named for it.

• List of individual rocks
• Frog Rock (Connecticut)

Sources

• Area attractions, Bainbridge Island Chamber of Commerce, 2015
• Hall, Julie (March 5, 2013), "A History of Bainbridge's Beloved Frog Rock", Inside Bainbridge
• Hutton, Jane (December 2012), "Distributed Evidence: Mapping Named Erratics", in Ellsworth, Elizabeth; Kruse, Jamie (eds.), Making the Geologic Now;Responses to Material Conditions of Contemporary Life, pp. 99–103, ISBN 978-0-9882340-2-4
• Kirby, Doug (October 8, 2010), "Bainbridge Island, Washington: Frog Rock", Roadside America
• Mears, Connie (June 17, 2011), "Frog Rock celebrates 40 years", Bainbridge Island Review
• Selfors, Dagmar (May 16, 2004), "Frog Rock has its own tale to tell", Kitsap Sun
• Thorness, Bill (2012), Biking Puget Sound: 50 Rides from Olympia to the San Juans, The Mountaineers Books, ISBN 9781594851261
• Wagonfeld, Judy (1999), Western Washington: Rides for the Casual Cyclist, Globe Pequot, p. 78, ISBN 9780762704354