Immigration 101

The U.S. immigration system is complex and can be difficult to understand. These resources provide key data points, historical information, and background on hot topics in immigration. Learn the basics about immigration.

Recent Features

Why Don’t Immigrants Apply for Citizenship?

There is no line available for undocumented immigrants and the “regular channels” do not include them.

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Fact Sheet
Temporary Protected Status: An Overview

This fact sheet provides an overview of how Temporary Protected Status designations are made, what benefits TPS confers, and how TPS beneficiaries apply for and regularly renew their status.

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How the United States Immigration System Works

U.S. immigration law is very complex. Here's basic information about how the U.S. legal immigration system is designed.

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All Immigration 101 Content

  • Special Report

Unequal Access: Immigrants and U.S. Health Care

Publication Date: 
July 1, 2006
By Sarita A. Mohanty, M.D., M.P.H.Despite the important role that immigrants play in the U.S. economy, they disproportionately...
  • Research and Analysis

Learning from IRCA: Lessons for Comprehensive Immigration Reform

Publication Date: 
May 1, 2006
If the current political stalemate over immigration reform is any indication, many U.S. policymakers have yet to heed the lessons of recent history when it comes to formulating a realistic strategy...
  • Research and Analysis

More Than a Temporary Fix: The Role of Permanent Immigration in Comprehensive Reform

Publication Date: 
January 1, 2006
The immigration debate once again is dominated by narrow thinking and the search for simplistic solutions to complex problems. Most lawmakers and the press have come to equate “immigration reform”...
  • Research and Analysis

A Lifeline to Renewal: The Demographic Impact of Immigration at State and Local Levels

Publication Date: 
August 1, 2005
Immigrant numbers should be taken in the context of native population growth or decline to better understand the impact of immigration.
  • Fact Sheet

From Refugees to Americans: Thirty Years of Vietnamese Immigration to the United States

Publication Date: 
June 1, 2005
Thirty years after the fall of the Saigon government, Vietnamese Americans celebrate the fact that they have moved far beyond their refugee origins and become successful economic and political...
  • Fact Sheet

Ties that Bind: Immigration Reform Should be Tailored to Families, Not Just Individuals

Publication Date: 
May 1, 2005
Given the extent to which undocumented immigrants already living in the United States are part of U.S.-based families, comprehensive immigration reform must include more than just a new temporary...
  • Special Report

Diversity and Transformation: African Americans and African Immigration to the United States

Publication Date: 
March 1, 2005
Successive generations of African immigration have continuously transformed the African American community and the sociopolitical climate of the United States.
  • Research and Analysis

Remembering December 17: Repeal of the 1882 Chinese Exclusion Act

Publication Date: 
December 1, 2004
December 17 marks the anniversary of the 1943 repeal by Congress of the Chinese Exclusion Act of May 6, 1882. With only a few exceptions, this law barred any Chinese from immigrating to the United...
  • Fact Sheet

Power and Potential: The Growing Electoral Clout of New Citizens

Publication Date: 
October 1, 2004
Immigrants – and groups in which immigrants are a large percentage of the population, such as Latinos and Asian/Pacific Islanders (APIs) – are a growing portion of the U.S. electorate. In a closely...
  • Special Report

The McCarran-Walter Act: A Contradictory Legacy on Race, Quotas, and Ideology

Publication Date: 
June 1, 2004
The McCarran-Walter Act of 1952 ended the blanket exclusion of immigrants based on race and created the foundation for current immigration law, but imposed a racialized immigration quota system and...
  • Blog

California Law Would Prevent Transfers From Local Law Enforcement to ICE Custody

September 9, 2021

Proposed legislation in California that would further limit the state’s involvement in immigration detention has made progress toward becoming law. The VISION Act would prevent transfers to U.S....

  • Blog

President Biden is Overseeing a Historic Decline in Legal Immigration

August 31, 2021

The Biden administration predicts that it will fail to issue many of the legal permanent resident visas—also known as green cards—allotted this year for immigrants who have been sponsored by a U.S...

  • Blog

Felony Reentry Immigration Law Is Unconstitutional Due to Racist Origins, Judge Rules

August 27, 2021

The post Felony Reentry Immigration Law Is Unconstitutional Due to Racist Origins, Judge Rules...

  • Blog

Diversity Visa Lottery Winners Might Lose Chance to Come to the U.S. Due to Delays, Trump Policies

August 25, 2021

For the second year in a row, many winners of the diversity visa lottery face the prospect of losing their chance to come to the United States because the federal government can’t—or won’t—issue...

  • Blog

People of Color Made Up All of the United States’ Population Growth in the Last 10 Years

August 18, 2021

Demographers have known for decades that the United States is well on its way to becoming a predominantly multi-racial and multi-ethnic society. New data from the 2020 Census reveals how rapidly...

  • Blog

America’s Ending in Afghanistan Must Ensure Safe Passage for Our Afghan Allies

August 18, 2021

Across centuries, Afghanistan has been a nation unconquerable. From the conquest of Alexander the Great to the United States military, insurgent forces have beat back the offensive from some of...

  • Blog

The New CBP One App May Put Immigrants and Travelers’ Privacy at Risk

August 5, 2021

It is unquestionable that technology creates efficiencies. But efficiency should not come at the total expense of privacy. A new app from U.S. Customs and Border Protection (CBP) toes that line...

  • Blog

The COVID-19 Pandemic Made USCIS Backlogs Go from Bad to Worse

July 6, 2021

Backlogs, processing delays, and revenue shortfalls are nothing new at U.S. Citizenship and Immigration Services (USCIS). The agency has long suffered from severe structural problems that hurt...

  • Blog

Biden Signals Big Changes to Legal Immigration and Asylum Law with Spring Regulatory Agenda

June 16, 2021

Twice each year, the federal government publishes a “regulatory agenda,” a preview of all the proposals that are in the pipeline to become federal regulations. Last week, the Biden administration...

  • Blog

The Supreme Court Limits the Crimes That Can Lead to Near-Automatic Deportation

June 14, 2021

The Supreme Court issued a decision last Thursday in a criminal case that will have an immediate impact on immigration law. The new decision set a limit on the types of crime that can be...

  • Blog

Data Snapshot: Asians and Pacific Islanders in the United States

May 17, 2023

Each May, the United States recognizes the influence and contributions of Asian and Pacific Islanders during AAPI Heritage Month. It also serves as a time to reflect on the many differences among...

  • Blog

English-Only Education is on the Decline—But Arizona Holds Out

May 5, 2023

Written by Bella Wexler, Communications Fellow at the American Immigration Council. As of 2023, Arizona remains the only state with English-only education legislation still in effect. Its law—...

  • Practice Advisories

Nightingale v. USCIS and FOIA Requests for Immigration Case Files (A-Files)

Publication Date: 
April 17, 2023
This practice advisory explains 1) the ways to submit a FOIA request for a client’s immigration records, or A-File, 2) provides suggestions for avoiding agency rejections of the requests, and 3) identifies issues related to the Nightingale injunction that class counsel are monitoring.
  • Blog

A Florida Court Blocks ‘Parole + ATD’ Program in Latest Fight Between State and Federal Immigration Authority

March 21, 2023

On March 8, a Florida court blocked the Biden administration from using a key border program referred to as Parole plus Alternative to Detention (Parole + ATD). The court’s decision vacated the...

  • Blog

Immigration Agencies Violate FOIA, Harming Immigrants and Government Transparency Alike

March 17, 2023

Immigration agencies have a problem with transparency. With an immigration system as complex as ours and Freedom of Information Act offices that are chronically underfunded, it’s no surprise that...

  • Blog

Black Immigrants in the United States: Population, Spending Power, and Political Capital

February 24, 2023

Written by Steven Hubbard, Senior Data Scientist and Robin Lundh, Research Manager Black immigrants make up a vital part of America’s rich cultural life. Think of authors Chinua Achebe and...

  • Blog

At Dueling Border Hearings, New House Majority Pushes Partisan Narrative Over Facts

February 10, 2023

In January, Republicans took control of the House of Representatives. After a lengthy fight over the Speaker of the House resolved, the new majority wasted no time in holding multiple hearings on...

  • Press Release

New Research Shows the Key Role Immigrants Play in 13 States’ Healthcare Workforces

February 3, 2023
The American Immigration Council reports underscore the key role of immigrant healthcare workforces of Arizona, Florida, Georgia, Iowa, Kansas Missouri, North Carolina, Oklahoma, Tennessee, Texas, Utah, Virginia, and Wisconsin.
  • Blog

USCIS’ Funding Crisis Might Be Too Big for the Agency to Fix by Itself

January 17, 2023

On January 3, U.S. Citizenship and Immigration Services (USCIS) finally published a new proposed fee schedule for immigration benefits—which is to say, it took an important step to becoming a...

  • Fact Sheet

An Overview of the “Uniting for Ukraine” Program

Publication Date: 
January 13, 2023
This program allows Ukrainians displaced by the Russian invasion of Ukraine to apply to come to the United States through “humanitarian parole.” Ukrainians who are granted humanitarian parole may...

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