Where to look first: documents you already have

Your Social Security number appears on several documents you may have at home. Check your tax returns (Form 1040), W-2 forms from employers, bank statements, mortgage or rental agreements, and insurance policies. If you have a Social Security card in a drawer or file, that's the fastest route. Many people find the number this way without contacting anyone.

If you've moved recently, look through old mail. Statements from previous banks, utility companies, or medical providers often print your number on the envelope or inside. Your state's tax return (if you filed one) will also have it. These documents are usually easier to locate than contacting a government office.

Contacting the Social Security Administration directly

If you cannot find your number in documents, you can contact the Social Security Administration (SSA) in person, by phone, or by mail. The SSA will ask you to prove your identity before releasing your number. Bring or send a government-issued photo ID (driver's license, passport, or state ID card) and proof of citizenship or legal residency (birth certificate, naturalization papers, or visa).

Call the SSA's main line at 1-800-772-1213. The wait time varies by time of day and season, but calling early in the morning on a weekday usually means a shorter hold. You can also visit a local Social Security office in person. Find the nearest office at ssa.gov/locator. Walk-in hours vary by location, and some offices now require an appointment scheduled online or by phone.

If you prefer to write, send a letter to the Social Security Administration, Office of Public Inquiries, 449 3rd Street SW, Floor 4, Washington, DC 20024. Include copies (not originals) of your identity documents and a brief explanation of why you need your number. Responses by mail typically take two to four weeks.

What to bring or send to prove who you are

The SSA will not give out your number without proof of identity. Acceptable documents include a current driver's license, passport, state ID card, military ID, or tribal ID. If you don't have a photo ID, bring two documents that show your name and date of birth, such as a birth certificate and a bank statement with your name on it.

For proof of citizenship or legal residency, bring your original birth certificate, U.S. passport, Certificate of Naturalization, Certificate of Citizenship, or a valid visa. If you're applying by mail, send photocopies, not originals — the SSA will not return them. Keep the originals for your records.

Getting a replacement Social Security card at the same time

If you need both your number and a replacement card, you can request both during the same visit or application. There is no fee for a replacement card. The SSA will issue you a new card with your number printed on it, which you can use as proof of your number going forward.

If you apply in person, you may receive your card within one to two weeks. If you apply by mail, allow three to four weeks. Some state motor vehicle departments can now issue replacement cards on your behalf — check your state's DMV website to see if this service is available where you live.

Key Takeaways

  • Check tax returns, W-2 forms, bank statements, insurance papers, and old mail before contacting the Social Security Administration.
  • You can reach the SSA by phone at 1-800-772-1213, in person at a local office, or by mail with copies of your identity documents.
  • The SSA requires a government-issued photo ID and proof of citizenship or legal residency before releasing your number.
  • Getting a replacement Social Security card at the same time takes one to four weeks depending on whether you apply in person or by mail.

What happens if your Social Security number has been compromised

If you believe someone has used your number without permission, contact the SSA and file a report with the Federal Trade Commission (FTC) at identitytheft.gov. The FTC will create a recovery plan and send you a letter you can show to creditors and banks. You can also place a fraud alert on your credit report by contacting one of the three major credit bureaus (Equifax, Experian, or TransUnion).

The SSA does not change your number unless you can show that someone else is using it and causing you direct harm. A new number is rare and requires documentation of the misuse. Focus first on monitoring your credit report and accounts for unauthorized activity, which you can do for free at annualcreditreport.com.

Frequently Asked Questions

Can I look up my Social Security number online?

The SSA does not have an online portal where you can look up your number. You must contact them by phone, in person, or by mail. However, if you have a my Social Security account at ssa.gov, you can view your earnings record, which may help you confirm your number if you already know part of it.

What if I don't have a photo ID?

Bring two documents showing your name and date of birth instead, such as a birth certificate, bank statement, utility bill, or school records. The SSA accepts combinations of non-photo documents if you don't have a government-issued ID. Call ahead to confirm what documents your local office will accept.

How long does it take to get my number if I apply by mail?

Mail applications typically take two to four weeks for a response. If you need your number urgently, visiting a local Social Security office in person is faster — you may receive confirmation the same day or within a few days. Call 1-800-772-1213 to find the nearest office and check their hours.

Will the SSA mail my Social Security number to me?

The SSA will not mail your number in a letter for security reasons. If you apply by mail, they will issue you a replacement Social Security card with your number printed on it, which arrives in three to four weeks. If you need the number sooner, call or visit in person.