Lummi Island lies at the southwest corner of Whatcom County, Washington, United States, between the mainland ration of the county and offshore San Juan County. The Lummi Indian Reservation is situated on a peninsula east of the island, but does not add up Lummi Island. The island has a land Place of 23.97 square kilometres (9.25 square miles) and had a population of 822 as of the 2000 census. The population approximately doubles in summer subsequently property owners from both Canada and the U.S. arrive for summer fun and relaxation.

The island is accessible by a 20-car ferry, the Whatcom Chief, run by Whatcom County Public Works. It is a 6-minute lane from Gooseberry Point upon the mainland to the island. Facilities upon the island tote up one general store, two restaurants, several bed and breakfast houses, a small library, post office, fire station, one church, a Salvation Army camp, and a vintage 1919 elementary school. The Beach Store Cafe is a popular local hangout following a small bar, and serves seafood and expected café fare. The Willows Inn serves more costly fare, featuring seasonal treats from island farms and fishers. The historic Lummi Island Congregational Church has a quiet, wooded cemetery. Lummi Island is best known for its unique reefnet salmon fishery, eclectic population of artists, picturesque seascapes, and rural setting. Its narrow, scenic and winding roads are popular like bicyclers. A trail to Lummi Mountain takes hikers through the Baker Preserve to astonishing high views of the San Juan and Gulf islands. The trail is maintained by the Lummi Island Heritage Trust.

Public education for island residents is provided by the Ferndale School District. It operates one elementary school (K-5) on the island, Beach Elementary School. Middle and tall school students attend schools upon the mainland.

The island was originally called Sa nam a o (“High Mountain”) and Skallaham by the original Lummi people. In 1792 Spanish explorers dubbed it Isla de Pacheco, and British colonists vanguard called it McLoughlin Island. In 1853, the U.S. National Geodetic Survey charted the island as Lummi, naming it after the local tribe. Later British and Americans adopted this term. Some theories suggest the herald was derived from a Lummi-language word.

The island’s name office was received by the United States supervision in 1882. At that mature the town and post office were named “Beach”, but today island mail is addressed to “Lummi Island, Washington”, though the Beach School and Beach Store Cafe retain the older name.