--- title: "Naturalization — APUSH Definition & Exam Guide" description: "Naturalization is the legal process by which immigrants become U.S. citizens. In APUSH, it's key to Gilded Age immigration debates and the 2023 citizenship DBQ." canonical: "https://fiveable.me/apush/key-terms/naturalization" type: "key-term" subject: "AP US History" unit: "Unit 6" --- # Naturalization — APUSH Definition & Exam Guide ## Definition Naturalization is the legal process by which foreign-born people become United States citizens. In APUSH it matters because Congress restricted who could naturalize by race, most famously barring Chinese immigrants under the Chinese Exclusion Act of 1882, making citizenship a contested Gilded Age issue. ## What It Is Naturalization is how an immigrant legally becomes an American citizen. It sounds like a boring bureaucratic procedure, but in [APUSH](/apush "fv-autolink") it's actually a story about who America decided was allowed to fully belong. From the very first naturalization law in 1790, Congress limited the process to "free white persons," and after the Civil War it was extended to people of African descent but not to Asians. That meant Chinese immigrants arriving during the Gilded Age could live and work in the U.S. for decades and still be permanently barred from [citizenship](/apush/key-terms/citizenship "fv-autolink"). This is the piece that connects naturalization to [Topic 6.8](/apush/unit-6/immigration-migration-gilded-age-1865-1898/study-guide/tFUqkhIaH3BOei1JuxAM "fv-autolink") (Immigration and Migration). As cities boomed with factories, immigrants poured in from Asia and from southern and eastern Europe seeking escape from poverty and persecution (KC-6.2.I.A). But the legal welcome mat wasn't the same for everyone. The Chinese Exclusion Act of 1882 didn't just cut off most Chinese immigration; it also explicitly made Chinese immigrants ineligible for naturalization. So when you see "naturalization" in an APUSH question, think less about paperwork and more about the racial boundaries of citizenship. ## Why It Matters Naturalization lives in [Unit 6](/apush/unit-6 "fv-autolink") (Industrialization and the Gilded Age, 1865-1898) under Topic 6.8, supporting learning objective APUSH 6.8.A, which asks you to explain how cultural and economic factors affected [migration patterns](/apush/key-terms/migration-patterns "fv-autolink") over time. Here's the link. Economic factors pulled millions of immigrants to industrial cities (KC-6.1.II.B.ii, KC-6.2.I.A), but cultural factors, especially nativism, shaped how those immigrants were received once they arrived. Naturalization law is where that nativism got written into the legal code. The term also feeds directly into the National Identity theme. The 2023 DBQ asked how definitions of U.S. citizenship changed from 1865 to 1920, and naturalization restrictions are exactly the kind of evidence that question rewards. If you can explain who could naturalize and who couldn't, you can argue about how "American" was being defined. ## Connections ### Chinese Exclusion Act and Angel Island (Unit 6) The [Chinese Exclusion Act](/apush/key-terms/chinese-exclusion-act "fv-autolink") of 1882 is the clearest example of naturalization being denied by race, since it barred Chinese immigrants from becoming citizens at all. Angel Island, the West Coast immigration station, is where that exclusionary system played out in practice, with Chinese arrivals detained and interrogated rather than processed through. ### Fourteenth Amendment and Reconstruction (Unit 5) The [14th Amendment](/apush/key-terms/14th-amendment "fv-autolink") (1868) created birthright citizenship, meaning anyone born on U.S. soil is a citizen automatically. Naturalization is the other path to citizenship, the one for people born abroad, and it stayed racially restricted long after the 14th Amendment passed. The two together explain how a Chinese immigrant could never naturalize while their American-born child was a citizen from day one. ### Ellis Island and "New Immigrants" (Unit 6) Immigrants from southern and [eastern Europe](/apush/key-terms/eastern-europe "fv-autolink") arriving through Ellis Island faced nativist hostility, but unlike Asian immigrants, they were legally eligible to naturalize because the law classified them as white. That legal difference is a great compare-and-contrast point for essays about Gilded Age immigration. ### Gentlemen's Agreement and 1920s Immigration Restriction (Unit 7) Restrictions on naturalization in the Gilded Age set the precedent for the bigger restriction era that followed, including the Gentlemen's Agreement of 1907 limiting Japanese immigration and the quota laws of the 1920s. If you're writing a continuity argument about nativism, naturalization law is the thread running through both units. ## On the AP Exam Naturalization usually shows up as supporting evidence rather than the headline of a question. In multiple choice, expect stimulus passages about Chinese exclusion, nativist movements, or debates over citizenship, where knowing that naturalization was racially restricted helps you eliminate wrong answers. On the essay side, the 2023 DBQ asked you to evaluate how definitions of U.S. citizenship changed from 1865 to 1920, and naturalization is tailor-made evidence for that prompt. The strongest move is using it for complexity, showing that citizenship expanded for some groups (the 14th Amendment, naturalization extended to people of African descent in 1870) while staying closed to others (Chinese immigrants barred in 1882). That change-plus-continuity combo is exactly what top-scoring DBQ arguments do. ## naturalization vs Birthright citizenship (14th Amendment) These are the two separate doors into U.S. citizenship, and mixing them up wrecks essay arguments. Birthright citizenship comes from the 14th Amendment and applies automatically to anyone born in the United States, which the Supreme Court confirmed even for children of Chinese immigrants in U.S. v. Wong Kim Ark (1898). Naturalization is the legal process for foreign-born people, and Congress controlled who qualified, restricting it by race for most of American history. So a Chinese immigrant could be permanently barred from naturalizing while their U.S.-born child was a full citizen at birth. ## Key Takeaways - Naturalization is the legal process by which foreign-born people become U.S. citizens, and Congress decided who was eligible. - Naturalization was racially restricted, limited to white persons from 1790 and extended to people of African descent in 1870, but Asian immigrants remained excluded. - The Chinese Exclusion Act of 1882 barred Chinese immigrants from naturalization entirely, making them permanent non-citizens no matter how long they lived in the U.S. - Naturalization is different from birthright citizenship under the 14th Amendment, which made anyone born on U.S. soil a citizen automatically. - European immigrants arriving through Ellis Island could naturalize because the law counted them as white, while Asian immigrants processed at Angel Island could not, a key contrast for Gilded Age essays. - Naturalization restrictions are strong evidence for citizenship-themed DBQs, like the 2023 prompt on how definitions of U.S. citizenship changed from 1865 to 1920. ## FAQs ### What is naturalization in APUSH? Naturalization is the legal process by which foreign-born people become U.S. citizens. In APUSH, it matters because the process was restricted by race, most notably the Chinese Exclusion Act of 1882, which barred Chinese immigrants from citizenship during the Gilded Age. ### Could Chinese immigrants become U.S. citizens in the 1800s? No. The Chinese Exclusion Act of 1882 explicitly barred Chinese immigrants from naturalization, so even immigrants who had lived in the U.S. for decades could never become citizens. Their children born in the U.S., however, were citizens by birthright under the 14th Amendment. ### How is naturalization different from birthright citizenship? Birthright citizenship comes from the 14th Amendment (1868) and applies automatically to anyone born in the United States. Naturalization is the process for foreign-born immigrants, and Congress restricted it by race, so the two paths produced very different outcomes for immigrant families. ### Did the 14th Amendment let all immigrants become citizens? No. The 14th Amendment guaranteed citizenship to people born in the U.S., but it did not change naturalization law for the foreign-born. Naturalization was extended to people of African descent in 1870, yet Asian immigrants remained ineligible well into the 20th century. ### Why does naturalization matter for the citizenship DBQ? The 2023 DBQ asked how definitions of U.S. citizenship changed from 1865 to 1920, and naturalization law is ideal evidence. It lets you show both change (citizenship expanding after the Civil War) and continuity (racial exclusion persisting through Chinese exclusion), which is the kind of nuanced argument that earns the complexity point. ## Related Study Guides - [6.8 Immigration and Migration](/apush/unit-6/immigration-migration-gilded-age-1865-1898/study-guide/tFUqkhIaH3BOei1JuxAM) ## Structured Data ```json {"@context":"https://schema.org","@graph":[{"@type":"LearningResource","@id":"https://fiveable.me/apush/key-terms/naturalization#resource","name":"Naturalization — APUSH Definition & Exam Guide","url":"https://fiveable.me/apush/key-terms/naturalization","learningResourceType":"Concept explainer","educationalLevel":"AP® / High School","about":{"@id":"https://fiveable.me/apush/key-terms/naturalization#term"},"audience":{"@type":"EducationalAudience","educationalRole":"student"},"dateModified":"2026-06-11T05:27:30.531Z","isPartOf":{"@type":"Collection","name":"AP US History Key Terms","url":"https://fiveable.me/apush/key-terms"},"publisher":{"@type":"Organization","name":"Fiveable","url":"https://fiveable.me"}},{"@type":"DefinedTerm","@id":"https://fiveable.me/apush/key-terms/naturalization#term","name":"naturalization","description":"Naturalization is the legal process by which foreign-born people become United States citizens. 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