The Social Security Administration assigns numbers through a formal application process, not automatically at birth

A Social Security number is not issued to you simply because you are born in the United States. You or your parents must request one from the Social Security Administration (SSA). The SSA does not generate numbers on its own; someone has to file an application. For newborns, this usually happens in the hospital or shortly after, but it is a deliberate step, not an automatic one.

The number itself follows a pattern, but that pattern does not encode your birth date, location, or other personal information the way some people believe. The SSA stopped using predictable assignment methods in 2011 and now randomizes the first three digits (the area number), the middle two digits (the group number), and the last four digits (the serial number). This change was made partly to prevent identity theft, since predictable numbers were easier to guess.

Key Takeaways

  • Social Security numbers are not assigned at birth automatically; someone must file an application with the Social Security Administration.
  • For newborns, parents typically request a number at the hospital or through the SSA within weeks of birth, often at the same time they apply for a birth certificate.
  • The SSA randomizes all nine digits of the number now, so the number itself does not reveal your birth year, state, or other personal details.
  • Adults who were never assigned a number can request one by visiting a local Social Security office with proof of identity, age, and citizenship or immigration status.

How newborns get a Social Security number

When a child is born in a hospital, parents are usually offered the chance to request a Social Security number at the same time they register the birth. The hospital provides a form (often called a birth registration form or application for a Social Security number) that goes to the state vital records office. That office then shares the information with the SSA, which issues the number.

Parents can also request a number separately by visiting a local Social Security office with the child's birth certificate, proof of the parents' identity, and proof of the child's citizenship (usually the birth certificate itself). The SSA typically issues the number within two to four weeks. If parents do not request a number at birth, they can do so at any point later in the child's life using the same process.

What documents you need to request a number as an adult

If you never received a Social Security number and are now an adult, you can request one by visiting your local Social Security office in person. You cannot request a number by mail or online; the SSA requires a face-to-face appointment for adults applying for the first time.

Bring original or certified copies of documents that prove three things: your identity, your age, and your citizenship or immigration status. For identity, the SSA accepts a valid passport, state-issued ID, or driver's license. For age, a birth certificate works. For citizenship or immigration status, a U.S. birth certificate proves citizenship; a valid passport, visa, employment authorization document (EAD), or green card proves immigration status. The SSA has a full list of acceptable documents on its website, and you can call your local office ahead of time to confirm what you have is sufficient.

The timeline from application to receiving your number

For newborns, the SSA typically issues a number within two to four weeks of the hospital or office submitting the application. You will receive a Social Security card in the mail at the address provided on the application. Some hospitals now offer to mail the card directly to your home rather than waiting for you to pick it up.

For adults applying in person, the process is faster. The SSA can issue a number the same day you visit the office, though you will still receive the official card by mail within one to two weeks. If you need proof of your number before the card arrives, ask the SSA office for a printout or letter stating your number; they can provide this on the spot.

Why the SSA changed how it assigns numbers

Until 2011, the SSA used a system where the first three digits (area number) corresponded to the state where you applied for the number, and the middle two digits (group number) followed a predictable sequence. This meant someone could guess a valid Social Security number if they knew roughly where and when you were born. Criminals used this predictability to commit identity theft and fraud.

In June 2011, the SSA switched to randomization. Now all nine digits are assigned randomly, with no geographic or temporal pattern. This makes it much harder to guess or generate fake numbers. The change also means you cannot look at a Social Security number and determine where the person applied for it or when they were born.

What happens if your Social Security number is lost or stolen

If you lose your Social Security card or believe your number has been stolen, contact the SSA immediately. You can call the SSA's main number (1-800-772-1213) or visit a local office. The SSA can issue you a replacement card at no cost. You do not need to change your number unless you have evidence of identity theft, and even then, changing numbers is difficult and the SSA does it only in specific circumstances.

If you suspect identity theft, also contact the Federal Trade Commission (FTC) at IdentityTheft.gov. The FTC can help you create a recovery plan and may recommend placing a fraud alert or credit freeze with the credit bureaus. These steps do not change your Social Security number, but they make it harder for someone else to open accounts in your name.

Frequently Asked Questions

Can I choose my own Social Security number?

No. The SSA assigns numbers randomly and does not allow you to request a specific number. If you receive a number you believe is incorrect or was issued in error, you can contact the SSA to report it, but you cannot simply ask for a different one.

What if I was born outside the United States but am now a citizen?

You can request a Social Security number by visiting a local SSA office with proof of your identity, age, and U.S. citizenship (such as a naturalization certificate or passport). The process is the same as for any adult applying for the first time.

Do I need a Social Security number to get a job?

Most employers require a Social Security number for tax and wage reporting purposes. If you do not have one, you will need to request one before starting work. Some employers will hold a position while you complete the application process.

How long does a Social Security number last?

A Social Security number is yours for life. You keep the same number throughout your life, even if you move, change jobs, or change your name. The only exception is in rare cases of identity theft where the SSA determines a new number is necessary.

Can I get a Social Security number if I am not a U.S. citizen?

Yes, but only if you have a valid visa or immigration status that allows you to work or receive benefits in the United States. You will need to bring proof of your immigration status (such as an employment authorization document or visa) to a local SSA office, along with proof of identity and age.