Yes. If you are 18 or older, you have to show ID to enter a federal building, and since May 7, 2025, that ID must be a REAL ID-compliant driver’s license or one of a short list of approved alternatives like a U.S. passport, military ID, or permanent resident card.1Department of Homeland Security. ID Requirements for Federal Facilities The Federal Protective Service enforces this at thousands of facilities nationwide, and guards do not have discretion to wave you through without one.
Which IDs Get You Through the Door
The quickest check is your driver’s license itself. Look at the upper corner of the card. A REAL ID-compliant license carries a gold or black star; without that star, your license alone will not get you into a federal building.1Department of Homeland Security. ID Requirements for Federal Facilities States issued both compliant and non-compliant versions for years, so plenty of valid, unexpired licenses still fail this test.
If your license does not have the star, any of the following will work in its place:1Department of Homeland Security. ID Requirements for Federal Facilities
- U.S. passport or passport card
- U.S. military ID (active duty, reserve, or dependent)
- Permanent resident card (Form I-551)
- DHS trusted traveler cards: Global Entry, NEXUS, SENTRI, or FAST
Whatever you bring, it has to be current. An expired passport or lapsed military ID will be refused.
Mobile Driver’s Licenses and Tribal IDs
Roughly two dozen states and territories now issue digital driver’s licenses that live in Apple Wallet, Google Wallet, or a state app, and TSA’s 2024 final rule lets participating states use them at federal buildings under a temporary waiver.2Transportation Security Administration. TSA Announces Final Rule That Enables the Continued Acceptance of Mobile Drivers Licenses at Airport Security Checkpoints and Federal Buildings Arizona, California, Colorado, Georgia, Iowa, Maryland, New York, and Virginia are among the states on the current list. The catch is that the digital version has to be based on a REAL ID-compliant physical license; a mobile copy of a non-compliant license will not help you.3Transportation Security Administration. Participating States and Eligible Digital IDs
Photo IDs issued by federally recognized tribes are also accepted. REAL ID applies to state-issued licenses, not tribal documents.4Transportation Security Administration. REAL ID Frequently Asked Questions If the card cannot be scanned, security may inspect it by hand and check the tribe against the Bureau of Indian Affairs list, so a second ID as backup speeds things up.
Non-U.S. Citizens
Foreign visitors can enter with a valid foreign passport, a permanent resident card, or an employment authorization document with a photo (Form I-776).5General Services Administration. Bring Required Documents Some buildings, especially federal courthouses, may require that a foreign passport carry a current U.S. visa. Call ahead if you are relying on a foreign passport alone.
Visitors Under 18
The ID requirement applies to adults 18 and older.1Department of Homeland Security. ID Requirements for Federal Facilities A child with an identified adult is allowed in. An unaccompanied minor may draw questions at the checkpoint, but the formal photo-ID rule does not extend to them.
Federal Buildings That Don’t Require ID
Not every federal property has a checkpoint at the door. Post office lobbies are the clearest example: you can walk in to buy stamps or pick up a package without showing anything, though certain counter transactions still require ID. Public-facing service counters inside larger federal complexes may also sit outside the main screening area. Higher-security facilities are the opposite; everyone entering goes through the same screening no matter how brief the visit.
If You Show Up Without ID
The most likely outcome is being turned away. Security officers do not have authority to waive the requirement because you seem trustworthy or left your wallet in the car.
A few facilities offer workarounds. If you are visiting a specific federal employee, that person may be able to come down to the checkpoint, vouch for you, and escort you in. Whether this is available depends entirely on the building’s own policies, and higher-security buildings often refuse escorted access for anyone without ID. Some facilities run a secondary screening with additional questioning. Neither option is reliable enough to plan around. Treat your ID as non-negotiable.
What Not to Bring Through the Checkpoint
ID is only the first step. Most federal buildings run visitors through a metal detector and bags through an X-ray, and the list of banned items is long. Federal law makes it a crime under 18 U.S.C. § 930 to bring a firearm or dangerous weapon into a federal facility, with up to a year in prison for simple possession and stiffer penalties for federal courthouses.6Office of the Law Revision Counsel. 18 USC 930 – Possession of Firearms and Dangerous Weapons in Federal Facilities
Beyond firearms, prohibited items typically include:
- Knives and bladed items, including any blade longer than 2.5 inches, box cutters, and utility knives
- Impact weapons like brass knuckles, batons, and martial arts weapons
- Projectile weapons, including BB guns, pellet guns, stun guns, and slingshots
- Self-defense sprays like pepper spray and mace
- Explosives and flammable materials, including fireworks, gasoline, and lighter fluid
- Realistic replicas of firearms or explosives
If security finds a prohibited item, at minimum you will be told to take it back to your vehicle. Depending on what it is, you could be arrested on the spot.
Criminal Exposure for Bluffing Your Way In
Getting into a federal building the wrong way carries real consequences. Under 40 U.S.C. § 1315, violating Federal Protective Service regulations, which includes going around a checkpoint or ignoring an officer’s instructions, can bring a fine and up to 30 days in jail.7Office of the Law Revision Counsel. 40 USC 1315 – Law Enforcement Authority of Secretary of Homeland Security for Protection of Public Property
Entering or staying in a restricted federal building or its grounds without authority is a federal misdemeanor under 18 U.S.C. § 1752, punishable by up to a year. If a weapon is involved or someone is seriously injured, it becomes a felony carrying up to 10 years, and attempt and conspiracy carry the same penalties as the completed offense.8Office of the Law Revision Counsel. 18 USC 1752 – Restricted Building or Grounds
Presenting a fake ID or lying about who you are to get in triggers 18 U.S.C. § 1001, the federal false-statements statute. That is a felony carrying up to five years, or up to eight years if the false statement relates to terrorism.9Office of the Law Revision Counsel. 18 U.S. Code 1001 – Statements or Entries Generally
Before You Go
Check your license for the REAL ID star before you leave. If it is not there, bring your passport, passport card, or another accepted document instead. Give yourself extra time; security lines at busy federal buildings can run 15 to 30 minutes during peak hours. Leave weapons, pocket knives, pepper spray, and anything else that will set off a metal detector in the car. Look up the specific building’s rules ahead of time, especially for federal courthouses, which often have their own restrictions on phones, laptops, and recording devices.