Brown Island is a small, private island in Friday Harbor on San Juan Island, San Juan County, Washington, United States. It lies just offshore to the east-northeast of the town of Friday Harbor, Washington. The island has a land area of approximately and on January 1, 2008, it had a resident full-time population of 10 people.

Brown Island was named by the Wilkes Expedition in 1841 for the party's navigational instrument repairman, John G. Brown.

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References

Brown Island: Blocks 1024 and 1025, Census Tract 9604, San Juan County, Washington United States Census Bureau