Title: Immigration to the United States
Content:  to 1890, 82% of immigrants came from North and Western Europe. From 1891 to 1920, that number decreased to 25%, with a rise in immigrants from East, Central, and South Europe, summing up to 64%. Animosity towards these different and foreign immigrants increased in the United States, resulting in much legislation to limit immigration. Contemporary immigrants settle predominantly in seven states, California, New York, Florida, Texas, Pennsylvania, New Jersey and Illinois, comprising about 44% of the U.S. population as a whole. The combined total immigrant population of these seven states was 70% of the total foreign-born population in 2000.
Title: History of the west coast of North America
Content:  Both the gold rushes and the building of the railroads required vast amounts of labor. One available source that was used on both sides of the border were immigrants from East Asia, largely from China and Japan. These immigrants were willing to work for very little and played a crucial role in building the infrastructure of the west coast. However, they faced constant discrimination. Asians were deprived of their civil rights in both the United States and Canada. There was also pressure to restrict Asian immigration, opinions that were acted on with quotas, head taxes, and finally a complete ban in both nations in the 1920s. Because of discrimination, and also a desire to remain a community, Chinatowns developed in all the major cities along the west coast.
Title: History of the west coast of North America
Content:  first transcontinental railroads (completed in 1869) stretched across the United States. For the first time, it was relatively cheap and easy for migrants and immigrants to move to the west coast. In 1867, the United States acquired Alaska from the Russian Empire, capping American westward expansion on the North American continent. The next 75 years saw a monumental change on the west coast of the United States. Successive booms of agriculture, oil, entertainment, and industry greatly increased California's population. Logging, fishing, and industry drove the economies of California, Oregon, and Washington. However, Alaska had a small economy, despite the three gold rush eras (Klondike, Nome, and Fairbanks) and commercial fishing. This was due 
Title: History of the Jews in the United States
Content:  In the nineteenth-century, Jews began settling throughout the American West. The majority were immigrants, with German Jews comprising most of the early nineteenth-century wave of Jewish immigration to the United States and therefore to the Western states and territories, while Eastern European Jews migrated in greater numbers and comprised most of the migratory westward wave at the close of the century. Following the California Gold Rush of 1849, Jews established themselves prominently on the West Coast, with important settlements in Portland, Oregon; Seattle, Washington; and especially San Francisco, which became the second-largest Jewish city in the nation. Eisenberg, Kahn, and Toll 
Title: West Coast of the United States
Content:  Since the West Coast has been populated by immigrants and their descendants more recently than the East Coast, its culture is considerably younger. Additionally, its demographic composition underlies its cultural difference from the rest of the United States. California's history first as a major Spanish colony, and later Mexican territory, has given the lower West Coast a distinctive Hispanic American tone, which it also shares with the rest of the Southwest. Similarly, two of the three cities in which Asian Americans have concentrated, San Francisco and Los Angeles,  are located on the West Coast, with significant populations in other West Coast cities. San Francisco's Chinatown, 
Title: West Coast of the United States
Content:  The history of the West Coast begins with the arrival of the earliest known humans of the Americas, Paleo-Indians, crossing the Bering Strait from Eurasia into North America over a land bridge, Beringia, that existed between 45,000 BCE and 12,000 BCE (47,000–14,000 years ago). Small isolated groups of hunter-gatherers migrated alongside herds of large herbivores far into Alaska. Between 16,500 BCE and 13,500 BCE (18,500–15,500 years ago), ice-free corridors developed along the Pacific coast and valleys of North America and possibly by sea. Alaska Natives, indigenous peoples of the Pacific Northwest Coast, and California indigenous peoples eventually descended from the Paleo-Indians. They developed various languages and established. Later, Spanish, British, French, Russian, and American explorers and settlers began colonizing the area. On May 10, 1869 the first transcontinental railroad was completed joining the West Coast to the East of the United States.
Title: Western United States
Content:  Facing both the Pacific Ocean and the Mexican border, the West has been shaped by a variety of ethnic groups. Hawaii is the only state in the union in which Asian Americans outnumber white American residents. Asians from many countries have settled in California and other coastal states in several waves of immigration since the 19th century, contributing to the Gold rush, the building of the transcontinental railroad, agriculture, and more recently, high technology. The border states—California, Arizona, New Mexico, and Texas—and other southwestern states such as Colorado, Utah, and Nevada all have large Hispanic populations, and the many Spanish place names 
Title: History of the west coast of North America
Content:  The west coast of North America likely saw the first sustained arrival of people to the continent. Although there are other theories, most scientists believe that the first significant groups of people came from Asia, through today's Bering Strait area, then through modern Alaska, and from there spread throughout North America and to South America. Although the cultures on the west coast of today's Canada and United States are not known to have developed substantial urban centers and sophisticated writing or scientific systems, it is likely that, before European contact, the population density was significantly higher than in the rest 
Title: Foreign relations of Mexico
Content:  Almost a third of all immigrants in the U.S. were born in Mexico, being the source of the greatest number of both authorized (20%) and unauthorized (56%) migrants who come to the U.S. every year. Since the early 1990s, Mexican immigrants are no longer concentrated in California, the Southwest, and Illinois, but have been coming to new gateway states, including New York, North Carolina, Georgia, Nevada, and Washington, D.C., in increasing numbers. This phenomenon can be mainly attributed to poverty in Mexico, the growing demand for unskilled labor in the U.S., the existence of established family and community networks that allow migrants to arrive in the U.S. 
Title: History of the west coast of North America
Content:  In this era, much of the west coast of North America transformed from an area still largely populated by indigenous peoples to widespread population of non-natives. In particular, the west coast of the United States showed the most dramatic change, beginning with the California Gold Rush and the subsequent opening of the transcontinental railroads, through the development of Hollywood in Southern California, and increased industry and agriculture in the U.S. Pacific Northwest. Canadian and Mexican development also proceeded during this time, but at a slower pace.

Question: where did immigrants enter the us on the west coast?
Answer: Angel Island Immigration Station.
San Francisco Bay.