Satellite Island lies in Prevost Harbor on the north side of Stuart Island in the San Juan Islands of San Juan County, Washington, United States. It has a land area of 116.42 acres (47.11 ha) and no resident population as it is a private island owned by the YMCA, which has five camping areas set up for its use. Two of the camps, Sunset Camp and Fellowship Camp, are used for overnight island trips by campers from YMCA Camp Orkila and are located on the western half of the island. Islander Camp is located on the east side of the island, and is used primarily by the Islander Teen Expedition, a kayaking trip which crosses into Canada's Gulf Islands. Mariner Camp is located on the east side of the island, near Islander Camp, and is used by the Mariner Teen Expedition, a sailing trip for teenagers.
- Satellite Island: Block 4010, Census Tract 9603, San Juan County, Washington United States Census Bureau