Santa Cruz Island was the largest privately owned island off the continental United States, but is currently part-owned by the National Park service (NPS owns 24%, and the Nature Conservancy owns 76%). The island, located off the coast of California, is 22 miles (35 km) long and from 2 to 6 miles (3.2 to 9.7 km) wide. It is part of the northern group of the Channel Islands of California, and at 61,764.6 acres (249.952 km) is the largest of the eight islands in the chain. Santa Cruz Island is located within Santa Barbara County, California. The coastline has steep cliffs, gigantic sea caves, coves, and sandy beaches. Defined by the United States Census Bureau as Block 3000, Block Group 3, Census Tract 29.10 of Santa Barbara County, the 2000 census showed an official population of two persons. The highest peak is Devils Peak, at 2450+ feet (747+ m).
A central valley splits the island along the Santa Cruz Island Fault, with volcanic rock on the north and older sedimentary rock on the south.
Santa Cruz is the only place where the Island Scrub Jay is found