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

Opportunity and Exclusion: A Brief History of U.S. Immigration Policy

Publication Date: 
January 13, 2012
The United States and the colonial society that preceded it were created by successive waves of immigration from all corners of the globe. But public and political attitudes towards immigrants have...
  • Fact Sheet

Eliminating Birthright Citizenship Would Not Solve the Problem of Unauthorized Immigration

Publication Date: 
November 4, 2011
There is no evidence that undocumented immigrants come to the U.S. just to give birth.
  • Fact Sheet

Mexican Migration Patterns Signal a New Immigration Reality

Publication Date: 
August 1, 2011
Fewer Mexicans are Entering the U.S., Fewer Are Leaving, and Mexican American Births Now Outpace Immigration from Mexico Much of what we thought we knew about immigration is changing, and...
  • Special Report

Second Annual DHS Progress Report

Publication Date: 
April 12, 2011
In its second year under the Obama Administration, the Department of Homeland Security (DHS)—which is responsible for the nation’s three immigration agencies (USCIS, CBP, and ICE)—continues to...
  • Special Report

Constitutional Citizenship: A Legislative History

Publication Date: 
March 28, 2011
Attacks against the Citizenship Clause of the 14th Amendment have picked up in recent months, with legislators at both the national and state levels introducing bills that would deny U.S. citizenship...
  • Fact Sheet

Papers Please: Eliminating Birthright Citizenship Would Affect Everyone

Publication Date: 
January 4, 2011
Attacks on birthright citizenship at the federal and state level are bound to take many forms—from outright repeal of the Fourteenth Amendment to refusal by states to issue birth certificates to...
  • Special Report

The New American Electorate (October 2010)

Publication Date: 
October 14, 2010
At a time when federal, state, and local elections are often decided by small voting margins—with...
  • Special Report

The Unwanted: Immigration and Nativism in America

Publication Date: 
September 13, 2010
It’s hardly news that the complaints of our latter-day nativists and immigration restrictionists—from Sam Huntington to Rush Limbaugh, from FAIR to V-DARE—resonate with the nativist arguments of some...
  • Research and Analysis

Explaining the Recent Decline in Unauthorized Migration

Publication Date: 
September 9, 2010
Immigration Enforcement in a Time of Recession Recent estimates from the Pew Hispanic Center indicate that the number of unauthorized...
  • Special Report

Back to the Border: A Historical Comparison of U.S. Border Politics

Publication Date: 
September 2, 2010
By Katherine Benton-Cohen and...
  • Blog

Midterms 2022: How and Where Immigrants Have Helped Create a More Diverse Electorate

October 11, 2022

With the 2022 midterm elections just weeks away, all eyes are shifting to states where close races are expected. A lot has changed since the last midterm elections in 2018—including the...

  • Blog

A New Bill Would Allow Millions of Immigrants to Apply for Green Cards

October 11, 2022

On September 28, Senator Alex Padilla (D-CA) introduced a bill in Congress that would allow millions of immigrants who have lived in the United States for many years to become Lawful Permanent...

  • Blog

Biden Administration’s New Public Charge Rule Should End Fear of Trump Wealth Test

September 16, 2022

Three years ago, the Trump administration sent fear throughout immigrant communities across the nation with its Public Charge rule, which functioned as a wealth test for green card applicants....

  • Blog

Hispanics in the US: What the Data Reveals About Shifting Geography, Ancestry, and Voting Patterns

September 14, 2022

This Hispanic Heritage Month, we look at the most recent Census and data to highlight the importance of Hispanics in the United States. For those wondering why Hispanic Heritage Month starts mid-...

  • Blog

Biden Administration Close to Reaching Increased Cap on Employment-Based Green Cards

September 13, 2022

The Biden administration is close to using all of the employment-based immigrant visas (green cards) allotted for Fiscal Year (FY) 2022. U.S. Citizenship and Immigration Services (USCIS) announced...

  • Blog

Immigration Status Will No Longer Be a Barrier for Aspiring Lawyers in New Mexico

September 9, 2022

Written by American Immigration Council staff Leani García Torres and Raul Pinto The Deferred Action for Childhood Arrivals (DACA) initiative provides certain young, undocumented immigrants with a...

  • Blog

Fact Check: Migrants Aren’t the Ones Smuggling Fentanyl Into the United States

September 7, 2022

There is no doubt that fentanyl is a major problem inside the United States. Over the last decade, rising availability of fentanyl has caused a spike in overdose deaths across the nation. In 2021...

  • Blog

The Economic Impact When International Students Return Back to Campus

August 31, 2022

As hundreds of thousands of students prepare to go back to school this fall, it’s important to consider the outsized role international students play in both campus life and the United States...

  • Blog

How Schools Welcome Newly Arrived Immigrant and Refugee Students

August 25, 2022

School is back in session. For many states and localities across the country, that means welcoming newly arrived immigrant and refugee youth into the classroom. There will be increased need for...

  • Blog

Who Enforces Immigration Policy Anyway?

August 10, 2022

The lack of a major overhaul in the United States’ immigration system for roughly thirty years has created an ecosystem where states have attempted to insert their authority over immigration,...

  • Blog

Data Snapshot: The Number of Black Immigrants in the US Continues to Rise

February 9, 2024

By Karen Aho and Quinn Bankson Black immigrants not only contribute to America’s rich political and cultural history—think rapper Wyclef Jean, U.S. Congresswoman Ilhan Omar, or basketball’s Hakeem...

  • Blog

200 Immigration-Related Bills Have Already Been Introduced in State Legislatures in 2024

January 26, 2024

Amid inaction from the federal government on immigration policy and growing calls for action from localities, some state legislatures are taking a proactive role in welcoming immigrants and...

  • Blog

Naturalization Helps Immigrants and the United States Reach Full Potential

January 19, 2024

By Karen Aho, Consultant and Anna Shepperson, Research Associate When Sri Lankan business analyst Dinesh Prabaharan became a U.S. citizen in December of 2023, he expressed his gratitude at finally...

  • Fact Sheet

Naturalization in the United States

Publication Date: 
January 19, 2024
This fact sheet provides an overview of the benefits of obtaining naturalized citizenship in the United States, as well as information about the naturalized population and those who meet the...
  • Blog

State Department Extends Nonimmigrant Visa Interview Waivers Indefinitely

January 11, 2024

The State Department announced an update to its discretionary interview waiver policy for nonimmigrant visa applicants on December 21, 2023. It replaces the temporary policies in place for almost...

  • Blog

States Facing Worker Shortages Are Helping Migrants Secure Employment with New Resource Clinics

December 8, 2023

Many migrants, after being released from government custody, resettle in interior communities. These individuals and families often need immediate support in the form of housing, food, and...

  • Blog

Lawsuits Prompt Immigration Agencies to Publish Critical Documents in Their FOIA Libraries

December 1, 2023

Last September, U.S. Customs and Border Protection agreed to publish past versions of the Department of Homeland Security’s Privacy Impact Assessments on CBP One, the app that allows asylum...

  • Practice Advisories

Common Tools of Statutory Construction for Criminal Removal Grounds

Publication Date: 
November 28, 2023
This practice advisory describes some of the common tools of statutory construction to assist practitioners in advocating for narrow definitions of generic criminal removal grounds...
  • Blog

Map the Impact: Immigrants Make Up Over 18% of the Total US Population Growth

November 13, 2023

Written by Robin Lundh, Research Manager and Anna Shepperson, Research Associate. Immigration—long central to the American experience—has dominated news coverage in recent years. Between 2016 and...

  • Advocacy

Comment on Executive Office for Immigration Review Proposed Rule Regarding Restoring Appeal Procedures and Administrative Closure

Publication Date: 
November 7, 2023
The American Immigration Council and the American Immigration Lawyers Association submitted this comment in support of the proposed rule, "Appellate Procedures and Decisional Finality in Immigration...

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