The legal age in the United States is not a single number. Eighteen is the age of majority in most states and the point at which you become a legal adult for contracts, voting, jury duty, and medical decisions. But individual rights activate at different ages set by a mix of federal and state law: you can start working at 14, drive on a learner’s permit as early as 14 or 15, vote at 18, buy alcohol and tobacco at 21, and run for president only at 35. A few states even hold off on full adulthood until 19 or 21.
Here is the quick map before the details.
- 14: earliest age for most non-farm work; student pilot certificate for gliders and balloons
- 16: broader work options; student pilot certificate for powered aircraft; sexual consent in some states
- 17: private pilot certificate for powered aircraft
- 18: age of majority in most states; voting; jury duty; Selective Service registration; rifle and shotgun purchase from licensed dealers; marriage without consent; sexual consent in some states
- 19: age of majority in Alabama and Nebraska
- 21: alcohol; tobacco; handgun purchase from licensed dealers; credit card without a cosigner or independent income; age of majority in Mississippi for most purposes; U.S. Senate eligibility (25 for the House)
- 35: eligibility for the presidency
Age of Majority
The age of majority is the birthday the law stops treating you as a child. In most states, that is 18. Once you reach it, you can sign binding contracts like leases and car loans, sue or be sued in your own name, and make your own medical decisions. Before that birthday, most contracts you sign are voidable, and lawsuits involving you need a court-appointed representative.
Three states set it higher. Alabama and Nebraska use 19, though Nebraska lets 18-year-olds sign contracts involving real or personal property and consent to mental health treatment. Mississippi defines “minor” as anyone under 21 for most legal purposes, with an exception that allows 18-year-olds to enter property-related contracts. Someone can be a full legal adult in one state while still a minor across the border.
Emancipation Before 18
Minors who want legal independence earlier can petition a court for emancipation. Rules vary, but most jurisdictions require the minor to be at least 16 or 17, show financial self-sufficiency, and demonstrate that emancipation serves their best interest. Marriage and military enlistment can trigger it automatically in many places. Emancipation lets you sign leases, open accounts, and make medical decisions, but it does not override age thresholds set by the Constitution or federal statute. An emancipated 17-year-old still cannot vote, buy alcohol, or buy tobacco.
Voting, Jury Duty, and Running for Office
The 26th Amendment guarantees that no citizen 18 or older can be denied the right to vote on account of age, making 18 the nationwide floor for every federal, state, and local election.1Congress.gov. Constitution of the United States – Twenty-Sixth Amendment You will need to register through your state’s election office first; most states allow online registration.
Federal jury service also requires you to be at least 18, a U.S. citizen, and a resident of the judicial district for at least one year.2Office of the Law Revision Counsel. 28 USC 1865 – Qualifications for Jury Service State courts set similar age thresholds for their own juries.
Running for federal office requires more waiting. The Constitution sets the minimum age for the U.S. House at 25, the Senate at 30, and the presidency at 35.3Congress.gov. Overview of House Qualifications Clause4Congress.gov. ArtII.S1.C5.1 Qualifications for the Presidency Those numbers are in the constitutional text and cannot be lowered by ordinary legislation.
Selective Service Registration at 18
All male U.S. citizens and male immigrants between 18 and 25 are required to register with the Selective Service System within 30 days of their 18th birthday.5Selective Service System. Who Needs to Register The requirement covers green-card holders, refugees, and asylum seekers. Failing to register is technically a felony, but the practical consequences hit sooner: non-registrants can be permanently barred from federal student aid, federal employment, and federal job training programs, and immigrants who skip registration may face delays in citizenship proceedings.6Selective Service System. Men 26 and Older
Legislation signed in late 2025 as part of the annual defense policy bill transitions Selective Service to automatic registration, scheduled to take effect in December 2026. Eligible men will then be enrolled automatically. The underlying obligation stays the same.
Alcohol and Tobacco at 21
The legal age for both alcohol and tobacco is 21 nationwide.
For alcohol, the National Minimum Drinking Age Act ties highway funding to compliance: any state that allows anyone under 21 to purchase or publicly possess alcohol loses 8 percent of its federal highway money, and every state has fallen in line.7Office of the Law Revision Counsel. 23 USC 158 – National Minimum Drinking Age The federal rule targets purchases and public possession. Some states allow minors to drink on private property under direct parental supervision; the specifics vary widely.
For tobacco, the Tobacco 21 law signed in December 2019 made it illegal for any retailer to sell cigarettes, cigars, e-cigarettes, or any other tobacco product to anyone under 21.8Food and Drug Administration. Tobacco 21 It is a direct federal ban with no state opt-out, enforced by the FDA through compliance checks and civil penalties against retailers.
Firearms: 18 for Long Guns, 21 for Handguns
Federal law splits the age by firearm type. Licensed dealers cannot sell a rifle or shotgun to anyone under 18, and they cannot sell a handgun to anyone under 21.9Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts These limits apply to sales by federally licensed dealers. Private sales between individuals are not subject to the same federal age floor, though many states close that gap with their own rules.
State laws also layer on top of the federal baseline. Some raise the minimum age for all firearm purchases to 21 regardless of type; others require permits, waiting periods, or safety courses. If you are between 18 and 21, your state’s law will determine what is actually available to you.
Working
Federal child labor rules under the Fair Labor Standards Act set three main tiers for non-agricultural work.10U.S. Department of Labor. Workers Under 18
At 14 and 15, you can take most non-farm jobs, but your hours are tightly capped: no work during school hours, no more than three hours on a school day or eight on a non-school day, no more than 18 hours in a school week or 40 in a non-school week, and no work before 7 a.m. or after 7 p.m. (extended to 9 p.m. from June 1 through Labor Day).
At 16, the hour restrictions drop and the job list widens. Hazardous occupations remain off-limits.
At 18, all federal child labor restrictions end. You can work in any occupation, including the 17 categories of hazardous work such as mining, roofing, operating heavy machinery, and demolition.11U.S. Department of Labor. Fair Labor Standards Act Advisor – Hazardous Occupations
Agricultural work follows a looser federal schedule, and children as young as 12 can work on farms with parental consent under certain conditions.12Office of the Law Revision Counsel. 29 USC 213 – Exemptions State child labor laws often go stricter than the federal baseline, so check your state.
Driving
Every state licenses drivers through a Graduated Driver Licensing (GDL) system that phases in privileges. The earliest learner’s permits are available at 14 in a handful of states, with 15 more common. A learner’s permit requires a licensed adult in the passenger seat at all times, and most states require a minimum number of supervised practice hours before you can move up.
An intermediate or restricted license, which lets you drive alone with conditions, becomes available between 15 and 17 depending on the state. Common restrictions include nighttime driving curfews and limits on young passengers. Full unrestricted licenses are typically available between 16 and 18 after enough time in each earlier stage and a passing road test. Breaking GDL rules can suspend your license or push back the next stage.
Credit Cards and Custodial Accounts
Turning 18 lets you open a bank account and sign financial contracts on your own, but credit cards are harder to get before 21. The CARD Act requires anyone under 21 applying for a credit card to show independent income sufficient to cover the payments or have a cosigner who is at least 21.13Office of the Law Revision Counsel. 15 USC 1637 – Open End Consumer Credit Plans A college student with no job cannot simply sign up.
If someone set up a custodial account for you under the Uniform Transfers to Minors Act or an earlier version, control transfers to you at the age of majority in your state. Some states let the custodian extend that to 21 or even 25. Once you reach the termination age, the money is yours to manage.
Marriage
You can marry without anyone else’s permission at 18 in every state. Below 18, the rules fracture. Historically, most states allowed 16- and 17-year-olds to marry with parental consent or a judge’s approval, and a few permitted younger marriages in cases involving pregnancy. As of 2025, roughly 16 states and the District of Columbia have set a hard floor at 18 with no exceptions. Child marriage remains legal in some form in the remaining states.
Age of Sexual Consent
The age at which someone can legally consent to sexual activity is set entirely by state law and ranges from 16 to 18. Most states include “close-in-age” or “Romeo and Juliet” exceptions that reduce or eliminate penalties when both people are near the same age. Violations can bring felony charges and, in many states, mandatory sex offender registration, with penalties that escalate sharply based on the age difference.
Medical Decisions
At the age of majority, you have full authority over your own medical treatment and health records. Before that, a parent or guardian usually makes those decisions, with several exceptions. Every state allows minors to consent to testing and treatment for sexually transmitted infections without parental involvement. A large majority also let minors seek substance abuse counseling and, often, outpatient mental health services on their own.
Some states recognize a “mature minor” doctrine, which lets a teenager who demonstrates sufficient understanding of a proposed treatment consent without parental approval, though providers use it cautiously. Emancipated minors, married minors, and minors living independently generally have broader medical consent rights, with the exact scope set by state law.
Pilot Certificates
Aviation has its own age ladder. The FAA issues student pilot certificates for gliders and balloons at 14 and for powered aircraft at 16.14eCFR. 14 CFR 61.83 – Eligibility Requirements for Student Pilots A student certificate lets you fly under an instructor’s supervision and eventually solo. A full private pilot certificate for powered aircraft requires reaching 17. These are federal minimums, so they apply the same way in every state.