Eliza Island is located in the western part of Bellingham Bay in the U.S. state of Washington. It lies just east of the southern part of Lummi Island, in Whatcom County. Eliza Island has a land area of 0.571 km2 (0.220 sq mi; 141 acres). Its population was ten persons as of the 2010 census. The south end of Eliza island is home to commercial and recreational crabbing.