Track the changes in US immigration law throughout history

A timeline of US immigration laws

The United States began regulating immigration soon after it won independence from Great Britain, and the laws since enacted have reflected the politics and migrant flows of the times. Here's a timeline of key immigration laws from 1790 to 2014, according to the Pew Research Center.

Explore the important legislation that has shaped US immigration policy

Read about pivotal immigration legislation from the 1882 Chinese Exclusion Act—the first law restricting immigration by nationality—through DACA, examining how economic conditions, national security concerns, and social attitudes shaped American immigration policy throughout history.

US immigrants shifted from primarily originating in Ireland and Germany to Mexico and India

This visualization tracks the top country of birth among US immigrants by state from 1850 to the present, revealing a dramatic shift from European-dominated immigration to today's prominence of Mexican and Indian immigrants.

The share of the immigrant population in the US peaked at nearly 16% in January 2025

In January 2025, the US reached a historic high of 53.3 million immigrants—nearly 16% of the population. By June of that year, the number had fallen by more than a million, ending 50 years of continuous growth in the immigrant population.

Multiple legal pathways exist for immigrating to the United States

This comprehensive guide outlines various routes to US immigration, including family-sponsored and employment-based visas, as well as humanitarian protections. Navigate the complex American immigration system and understand the options available to prospective immigrants seeking legal entry.

Explore the different experiences of immigrant communities arriving in the US

Immigrant communities experienced varied paths to entry and assimilation in America, depending on their arrival time and context. This Library of Congress resource provides detailed accounts of the experiences of major immigrant groups, drawing on primary sources.

A map of slavery's spread across the US

Need a visual on how prevalent slavery was in the US? Scroll through this interactive map and timeline based on census data from 1790 to 1860.

Travel in time to how people felt about major US events

Pollsters track more than just politics: From civil rights to war declarations, go back and see how people felt about major events in the US with this timeline.

America's demographic change in one chart

From 1901 to 2020, the US population has changed significantly. This video reveals the change in America’s demographics over more than 100 years.

Both parties largely agree that America's immigration system is broken

This three‑part podcast series traces America's immigration system origins, revealing how historically celebrated Ellis Island-era policies evolved into today's fractured, fact‑starved debate—shedding light on economic, cultural, and political forces shaping the current dysfunction.

Immigration enforcement shows how federalism plays out on the ground

In recent years, federalism has shifted from allowing policy diversity across states to open conflict, with states and the federal government increasingly trying to impose their preferences on one another over issues like abortion, voting, immigration, and public health.

Interactive human migration map

Using archeological, genetic, and climate data, scientists have pieced together an outline of the human odyssey—the journey that took our species from Africa to all corners of the globe. Experience this 200,000-year migration using an interactive human migration map.

Studies show immigrants commit crimes at lower rates than native-born Americans

Research examining incarceration records and crime data generally finds that immigrants—including undocumented individuals—have lower crime and incarceration rates than US-born citizens, though measurement is limited by gaps in national data on immigration status.

Tracking where people moved in the US in 2022

The latest data from the US Postal Service's change of address request system shows a decline in migration in 2022. See where people are moving and where they are leaving with this data breakdown.

Track the unusual push for mid-decade redistricting across the US

The National Conference of State Legislatures maintains a live tracker showing where mid-decade congressional redistricting is underway, detailing which states are pursuing new maps, the legislative and constitutional methods being used, and how courts are responding as the 2026 elections approach.

Explore US public health data

This resource tracks key US health metrics, including mortality causes, child survival rates, and life expectancy comparisons, to inform future health improvements, with regularly updated global estimates.

An interactive look at your own life through demographics

This interactive site allows you to understand the journey of your life in numbers and dates. World Data Lab asks users to enter their date of birth, country of birth, and sex at birth. The site then provides an interactive page tailored to your...

A guide to US pay transparency laws

Pay transparency laws in the US are evolving quickly, as some states introduce them for the first time and others update existing legislation. This resource has an updated list of key pay transparency legislation in states across the country, as well as general explainers about what each of those laws dictate. Check it out here.

An interactive investigation into drugs and migration in San Francisco

This interactive article investigates the connection between the boom in US migration from Honduras and drug dealing in San Francisco. A high concentration of Hondurans are fleeing Siria Valley, where poverty and national murder rates run high...

Interactive charts on human rights around the world

This website provides comprehensive data visualizations tracking human rights around the globe. While human rights have become much more protected, this varies between countries. Users can find information on how the protection of human rights has...

See the progress of the war in this interactive, visual timeline

Follow the progress Russian/Ukrainian War through this interactive map. Watch as events develop, get a daily overview of movements, and switch back and forth between different dates and time periods during the conflict. Results will change in real time and depending on all available information about troop movements and more.

Explore biographies of every justice who has served on the Supreme Court

This archive traces the whole history of the Supreme Court of the United States through detailed biographies of every justice, outlining their backgrounds, appointments, and the legal eras and decisions they helped shape.

The evolution of New York City

Originally founded as New Amsterdam, this interactive timeline lists out and provides deep dives on the major events that shaped New York City as it became America's foremost cultural and economic hub.

Explore the rise (and fall) of baby names over time

Baby names popularity and trends in the acclaimed interactive graph of baby name popularity. Watch as baby name trends rise and fall over time.

The US Constitution has been amended 27 different times since its ratification

Dive deeper into each amendment to the Constitution with resources provided by the National Constitution Center. This website features podcasts, videos, and other web resources for each of the amendments, examining their creation and their impact on today’s political and social landscape.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

The United States has had a tumultuous relationship with Cuba since its 1959 revolution, highlighted by a nuclear crisis and a decades-long trade embargo.

Calculate how much of your tax dollars go to each federal program based on your income, filing status, and number of children

A century of Billboard issues documenting the evolution of popular music.

Explore an interactive map built from more than 100,000 survey responses on where people find joy in their lives

Visualize the path of every solar eclipse from 1900 to 2099 and see what each looks like when observed from different locations on Earth.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

This real-time tracking of the hantavirus cruise ship outbreak in May 2026 offers a unique glimpse into the global reach of the outbreak and whether the virus sickened passengers and their communities around the world.

See how each of the more than two million known species relates to each other—and to common ancestors—in this zoomable tree of life.

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.

44% of Americans say they pray at least once a day—discover how your state's religiosity stacks up against the rest of the country.

Visualize how CRISPR-Cas9—a type of immune system used by single-celled organisms to attack invasive viruses—targets and makes precise changes to a gene's DNA.

While the first exchange-traded fund (a 'basket' of different assets that can be bought and sold on a stock exchange) in the US only launched in 1993, the global ETF market has grown to more than $10T in the short time since.

The American cockroach is actually from Africa, an apparent hitchhiker aboard ships carrying enslaved people, with evidence suggesting the bug may have arrived in the New World as early as the 1600s.

Explore fun facts from the USPS, including unique post office buildings, a stamp that traveled past Pluto, and more.

This site reaches millions of visitors who are tired of AI chatbots and seeking human connection. Pretend to be an AI chatbot and ask questions, provide answers, and draw for people in real time.

US housing costs have risen by roughly 175% between 1991 and 2026—but a growing number of Gen Zers are becoming homeowners anyway. In 2025, 4% of homebuyers were Gen Z, up from 3% the year before.

Fireworks-related ER visits are on the rise—in 2024, they increased by 52% as compared to the prior year.

View the ten deadliest tornadoes in US history.

The first line of 'immortal' human cells, which can divide indefinitely and are used in scientific research, was nonconsensually taken from a Black woman.

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

The Brothers Grimm were lawyers before they were storytellers, but became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

Researchers believe the brain consolidates memories, processes emotions, and plans for the future during dream states