The U.S. island considered the “Ellis Island of the West” is Angel Island , located in San Francisco Bay, California.

Why it’s called that

Angel Island served as the primary immigration station on the West Coast from 1910 to 1940, processing up to about one million immigrants , many of them from Asia.

Because it functioned as the western counterpart to New York’s Ellis Island—screening, detaining, and sometimes turning away newcomers—it earned the nickname “Ellis Island of the West.”

Quick snapshot

Feature| Angel Island (“Ellis Island of the West”)
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Location| San Francisco Bay, California 37
Years active as station| 1910–1940 35
Estimated immigrants processed| Up to ~1 million, many Asian 35
Main role| Immigration inspection and detention on the West Coast 35
Today| California State Park with historic Immigration Station museum 37

Information gathered from public forums or data available on the internet and portrayed here.