What Did the Hart-Celler Immigration Act Do?

The Hart-Celler Immigration Act, signed by President Lyndon B. Johnson on October 3, 1965, as Public Law 89-236, abolished the national-origins quota system that had governed U.S. immigration since 1924 and replaced it with a preference framework built around family relationships and job skills, backed by numerical ceilings and a uniform per-country cap.¹ Named for its sponsors, Senator Philip Hart and Representative Emanuel Celler, the law rewrote who could come to the United States and in what numbers. Its architecture still underlies American immigration law today.

The Quota System It Replaced

The Immigration Act of 1924 set each country’s annual immigration quota at two percent of that nationality’s population in the United States according to the 1890 census.² Anchoring the formula to 1890 was deliberate. That census predated the large waves of Southern and Eastern European immigration, so the quotas handed generous allotments to Great Britain and Germany, gave tiny numbers to Italy and Poland, and shut out most of Asia entirely.

The formula did what it was built to do for forty years. By the early 1960s, the civil rights movement had made an openly race-based immigration law politically untenable, and Cold War diplomacy suffered when the United States excluded potential allies in Asia and Africa on the basis of ancestry.

Ending National-Origin Discrimination

The 1965 act declared that no person could receive any preference or face discrimination in visa issuance because of race, sex, nationality, place of birth, or place of residence.¹ That single provision cut out the legal foundation of the 1924 system. A scientist from India and a laborer from England, who had faced radically different odds under the old quotas, now entered the same preference queue under the same per-country ceiling.

The Seven Preference Categories

In place of national-origin quotas, the act created a hierarchy of seven preference categories, each allotted a fixed share of the available visa pool. Four of the seven prioritized family reunification. The remaining categories covered employment and refugees.

First preference (20%): unmarried adult children of U.S. citizens.
Second preference (20%, plus unused first-preference visas): spouses and unmarried children of lawful permanent residents.
Third preference (10%): professionals and individuals with exceptional ability in the sciences or arts.
Fourth preference (10%, plus unused visas from higher categories): married children of U.S. citizens.
Fifth preference (24%, plus unused visas from higher categories): brothers and sisters of adult U.S. citizens.
Sixth preference (10%): workers in skilled or unskilled occupations facing labor shortages.
Seventh preference (6%): refugees fleeing communist-dominated countries, the Middle East, or natural disasters.

The percentages were drawn against the annual Eastern Hemisphere pool of 170,000 visas.¹ Supporters expected the family-heavy weighting to be self-regulating, on the theory that newcomers would follow existing communities. In practice, the fifth preference for siblings cast such a wide net that it produced the longest backlogs in the system, and applicants in that category from high-demand countries now wait decades for a visa number.

Congress overhauled the preference categories in 1990, but the modern family-based groupings (F1 through F4) map almost directly onto the 1965 priorities.³

Annual Ceilings and the Per-Country Limit

The act imposed two hemispheric caps. The Eastern Hemisphere received an annual ceiling of 170,000 visas, and no single country within it could claim more than 20,000 in a year.¹ The Western Hemisphere received a total cap of 120,000, with no per-country limit and no preference system at first.

The per-country ceiling was meant to keep any one nation from consuming a disproportionate share of visas. Under current law, that limit sits at 7 percent of the combined family-sponsored and employment-based preference totals.⁴ The result is enormous backlogs for high-demand countries like India, China, Mexico, and the Philippines, while lower-demand countries never approach the cap.

Immediate Relatives Sit Outside the Caps

One group escapes the numerical limits entirely. Spouses, unmarried children under 21, and parents of adult U.S. citizens qualify as “immediate relatives” and can obtain green cards without waiting for a visa number.¹ The 1965 act created this exemption, and in recent fiscal years immediate-relative admissions have regularly exceeded the total number of preference visas issued.

The Labor Certification Requirement

Hart-Celler built a gatekeeper into the employment-based categories that still functions today. Before a foreign worker can receive a preference visa, the Secretary of Labor must certify that there are not enough qualified U.S. workers available for the job and that hiring the foreign worker will not lower wages or worsen conditions for American workers in similar positions.⁵ The provision first appeared at section 212(a)(14) of the Immigration and Nationality Act and now lives at 8 U.S.C. § 1182(a)(5)(A), with the core test essentially unchanged.

Enforcement runs through a prevailing-wage system. Sponsoring employers must offer at least the average wage paid to similarly employed workers in the same occupation and geographic area, and they must document recruitment efforts showing no qualified American worker was available.⁶ These requirements reach most employment-based visa programs, including H-1B, where employers must pay the prevailing wage or the actual wage paid to similar employees, whichever is higher.

What Happened to Immigration from Latin America

Before 1965, immigration from Latin America and the Caribbean faced no numerical limits. Mexicans who wanted to work in the United States could enter through the Bracero guest-worker program or obtain a visa without competing against a hemispheric cap. The 120,000-person ceiling on the Western Hemisphere was, in effect, the first real numerical restriction on legal immigration from the Americas.

Congress tightened the framework further in 1976 by extending the 20,000-per-country limit to Western Hemisphere nations. In 1978 the separate hemispheric caps were merged into a single worldwide ceiling of 290,000 visas, reduced to 270,000 in 1980. For a country like Mexico that had been sending large numbers of workers north with no numerical constraint, competing for 20,000 visas a year alongside every other country was a drastic change. The gap between labor demand and available visas became one of the structural drivers of unauthorized immigration from Latin America in the decades that followed.

How the Act Reshaped American Demographics

In 1960, more than 80 percent of immigrants living in the United States had been born in Europe or Canada. By the early 2000s, that share had dropped below 20 percent, replaced by large increases from Asia, Latin America, Africa, and the Caribbean. The preference system’s emphasis on family reunification accelerated the shift because each new immigrant from a previously excluded region could sponsor relatives, who could then sponsor their own.

Representative Celler assured colleagues during debate that the ethnic composition of American immigration would not be upset. That assumption rested on an expectation that most beneficiaries would be Europeans with family already in the country. Once the national-origins barriers fell, applicants from countries that had been effectively locked out for forty years moved to take advantage of the new system, and the composition of the immigrant population shifted accordingly.

1
GovInfo. Public Law 89-236 – Immigration and Nationality Act Amendments
2
Office of the Historian. The Immigration Act of 1924 (The Johnson-Reed Act)
3
USAGov. Family-based immigrant visas and sponsoring a relative
4
U.S. Department of State. Provisions of the Law and Numerical Limitations on Immigrant Visas
5
Office of the Law Revision Counsel. 8 USC 1182 – Inadmissible Aliens
6
U.S. Department of Labor. Prevailing Wages