There is no national identity card in the US. The federal government has never issued a single document that every citizen carries to prove who they are. Instead, Americans rely on a mix of state-issued driver’s licenses and ID cards, federal documents like passports and Social Security cards, and, since May 2025, a federal standard called REAL ID that determines which state IDs are accepted at airports and federal buildings.
Why the United States Has No National ID
Dozens of countries issue a single government card that verifies identity and citizenship, sometimes requiring citizens to carry it at all times. Proposals to create one in the U.S. have surfaced repeatedly, usually tied to immigration policy, gun control, or healthcare reform. Each time, opposition has been broad and bipartisan.
Privacy advocates argue that a national ID would require a centralized government database tracking every resident, creating a target for surveillance and data breaches. Civil liberties groups warn the card could function as an internal passport, giving law enforcement a reason to stop and question anyone who looks or sounds “foreign.” There are practical objections too. The Social Security Administration once estimated that simply issuing the cards would cost at least $2.5 billion, and any card is only as trustworthy as the birth certificates and other documents used to obtain it.
Mission creep is the concern that has probably done the most to keep a national ID off the table. The Social Security number was originally created solely to track workers’ earnings for retirement benefits, and the limits on how it can be used have eroded steadily over the decades. Opponents argue a national ID would follow the same trajectory.
What emerged instead is a decentralized system. States issue driver’s licenses and non-driver ID cards. The federal government issues passports, Social Security numbers, military IDs, and immigration documents. No single document does everything, and most people end up carrying two or three.
The Documents Americans Actually Use
A handful of documents cover almost every situation where you need to prove who you are.
- State driver’s license or ID card. The everyday standard. Every state issues driver’s licenses, and every state also issues a non-driver identification card that works the same way for identity purposes. Fees for a non-driver ID generally range from free to about $40, and cards typically arrive within a few days to four weeks.
- U.S. passport. Issued by the Department of State, a passport proves both identity and citizenship. It is required for international air travel and is accepted for domestic ID purposes as well.
- U.S. passport card. A wallet-sized alternative to the passport book. It proves citizenship and identity, works for land and sea travel to Canada, Mexico, Bermuda, and parts of the Caribbean, and is accepted at TSA checkpoints and federal facilities. It cannot be used for international air travel.1U.S. Department of State. Get a Passport Card
- Social Security card. The card itself is not accepted as proof of identity because it has no photograph. It is used for tax reporting, employment records, and accessing government benefits.2Social Security Administration. Learn What Documents You Will Need to Get a Social Security Card
REAL ID: The Closest Thing to a National Standard
Congress passed the REAL ID Act in 2005, acting on a 9/11 Commission recommendation that the federal government set standards for how states issue driver’s licenses and ID cards.3Transportation Security Administration. About REAL ID The law did not create a federal ID card. It set minimum requirements that state IDs must meet before federal agencies will accept them.
A compliant ID must include a digital photograph, physical security features that prevent counterfeiting, and evidence that the holder is lawfully present in the United States. Federal agencies can refuse any state ID that does not meet these standards for “official purposes,” defined by the law as boarding a domestic commercial flight, entering a federal facility, and accessing nuclear power plants.4Department of Homeland Security. REAL ID Act – Title II
Enforcement Started May 7, 2025
After years of extensions, REAL ID enforcement began on May 7, 2025. TSA no longer accepts non-compliant state IDs at airport security checkpoints. Every airline passenger 18 and older, including TSA PreCheck members, must present either a REAL ID-compliant license or another acceptable form of identification to fly domestically.5Transportation Security Administration. TSA Begins REAL ID Full Enforcement Children under 18 do not need to show ID for domestic travel.6Transportation Security Administration. Acceptable Identification at the TSA Checkpoint
Is Your ID Already Compliant?
Look at the upper right corner of your driver’s license or state ID. A REAL ID-compliant card carries a star marking there. If yours has the star, you are set.7USAGov. How to Get a REAL ID and Use It for Travel If it does not, you will need to visit your state’s licensing agency to apply for an upgraded card before you can use it for federal purposes.
How to Get One
Applying for a REAL ID means visiting your state motor vehicle agency in person with specific documentation. Federal regulations require states to verify four categories of information.8eCFR. 6 CFR Part 37 – Real ID Drivers Licenses and Identification Cards Each state’s process differs slightly, but you should expect to bring:
- Proof of identity and date of birth: an unexpired U.S. passport, a certified birth certificate from a state vital records office, a Certificate of Naturalization, or a Permanent Resident Card. The same document covers your date of birth.
- Proof of your Social Security number: your Social Security card, or a W-2, SSA-1099, or pay stub showing your name and full number.
- Two documents showing your current home address, such as a utility bill, bank statement, mortgage document, or lease.
- Proof of lawful status. Citizens meet this with a birth certificate or passport. Non-citizens use immigration documents such as a Permanent Resident Card or Employment Authorization Document.
Check your state agency’s website before you go. Some states accept additional documents, and many let you upload copies online ahead of your appointment. Fees vary by state and are generally comparable to a standard license renewal.
Alternatives Accepted at Airports and Federal Buildings
A REAL ID license is not your only option. TSA accepts several other documents at airport checkpoints, and several also work for entering federal facilities:
- A U.S. passport or passport card. Either works for domestic flights, and the passport card is specifically recognized as a REAL ID alternative for domestic travel.9U.S. Department of State. U.S. Passports and REAL ID
- DHS trusted traveler cards, including Global Entry, NEXUS, SENTRI, and FAST.
- U.S. Department of Defense IDs, including those issued to dependents.
- A Permanent Resident Card (green card).
- Photo IDs issued by a federally recognized Tribal Nation, including Enhanced Tribal Cards.
- A foreign passport.
If you arrive at the airport with no ID at all, you are not automatically turned away. TSA may still allow you to fly after an identity verification process that can include questions to confirm who you are. Expect significant delays, and there is no guarantee of clearance.10Transportation Security Administration. I Forgot My Identification; Can I Still Proceed Through Security Screening?
Identification for Non-Citizens
Non-citizens living in the U.S. use federally issued identity documents that often carry more weight than a state ID because they prove identity and work authorization at the same time.
- The Permanent Resident Card, issued as Form I-551. It proves both identity and employment authorization and is accepted at TSA checkpoints, for Form I-9 employment verification, and at federal facilities.11U.S. Citizenship and Immigration Services. List A Documents That Establish Identity and Employment Authorization
- The Employment Authorization Document (EAD), issued as Form I-766. This photo card also establishes both identity and work authorization on its own.12U.S. Citizenship and Immigration Services. Acceptable Documents for Verifying Employment Authorization and Identity
- A foreign passport paired with a valid U.S. visa and I-94 arrival record can serve as both identity and employment documentation, depending on visa type.
Mobile Driver’s Licenses
A growing number of states offer mobile driver’s licenses, sometimes called digital IDs, that live in your phone’s digital wallet. TSA has been testing them at checkpoints and currently accepts them at more than 250 airports in participating states.13Transportation Security Administration. Participating States and Eligible Digital IDs
The legal framework is still developing. A 2024 federal rule created a temporary waiver process that allows TSA to accept a state’s mobile license for official purposes, but only if TSA has granted the state a waiver and the mobile license is based on an underlying physical card that is itself REAL ID compliant.14Federal Register. Minimum Standards for Drivers Licenses and Identification Cards Acceptable by Federal Agencies for Official Purposes; Waiver for Mobile Drivers Licenses For now, treat a mobile license as a convenience layer on top of your physical card, not a replacement for it. Keep the plastic in your wallet.