Culross Island is an island near the western end of Prince William Sound of the Gulf of Alaska in Alaska, United States. It lies just off the northeast corner of the Kenai Peninsula, separated from it by the Culross Passage. The island has a land area of 74.709 km² (28.845 sq mi) and had no population at the 2000 census.
- Culross Island: Block 1020, Census Tract 3, Valdez-Cordova Census Area, Alaska United States Census Bureau
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