Learn How to File for a Social Security Number

Understanding What a Social Security Number Is and Why You Might Need One

A Social Security Number (SSN) is a nine-digit identifier issued by the Social Security Administration (SSA), a federal government agency. The number appears in the format XXX-XX-XXXX. Originally created in 1936 as part of the Social Security program, the SSN has become a key identification tool used across many areas of American life.

According to the Social Security Administration, over 453 million Social Security Numbers had been issued as of 2023. The number serves multiple purposes beyond just Social Security benefits. Employers use SSNs to report wage information to the Internal Revenue Service (IRS). Banks and financial institutions use SSNs when you open accounts or apply for loans. Schools may use SSNs to track student records. Healthcare providers use them for billing and medical records. State governments use SSNs for driver's licenses and other identification purposes.

You may need to obtain an SSN if you are:

• A U.S. citizen born after 1986 who does not yet have a number
• A lawful permanent resident (green card holder)
• A person authorized to work in the United States on a temporary visa
• A noncitizen who needs one for tax purposes
• Receiving certain federal benefits that require an SSN

Not everyone needs an SSN. For example, certain visa holders who do not plan to work in the U.S. may not need one. Undocumented immigrants cannot obtain an SSN under current federal law, though some states offer alternative identification documents.

Practical Takeaway: Before starting the process, confirm that you actually need an SSN by reviewing which of your planned activities in the U.S. require one. Different situations have different requirements, so understanding your specific circumstance saves time.

Who Can Request a Social Security Number and Basic Requirements

The Social Security Administration has specific rules about who can receive an SSN. These rules differ depending on citizenship status and immigration authorization.

U.S. citizens born in the United States can request an SSN at any time. Parents often obtain SSNs for newborns shortly after birth, though this is not required. An adult U.S. citizen who never received an SSN can request one throughout their life. According to SSA data, approximately 21 million U.S. citizens over age 18 do not have a Social Security Number.

Lawful permanent residents (green card holders) are generally eligible to receive an SSN. The SSA will assign a number when the green card is issued or can issue one upon request with proper documentation.

Foreign nationals authorized to work in the United States on valid work visas, including H-1B visa holders, L-1 visa holders, and similar employment-based categories, may request an SSN. The key requirement is having work authorization documented by U.S. Citizenship and Immigration Services (USCIS).

Some noncitizens without work authorization but with other types of authorized presence may obtain an SSN for tax filing purposes only. These individuals receive an Individual Taxpayer Identification Number (ITIN) instead in many cases, though some exceptions exist for certain visa categories.

The Social Security Administration requires specific documentation to verify your identity, age, citizenship or immigration status, and work authorization. You cannot request an SSN entirely online or by mail—you must appear in person at an SSA office.

Practical Takeaway: Review your current immigration or citizenship status before visiting an SSA office. Having clarity on your legal status helps ensure you bring the right documents and reduces the chance of being turned away.

Documents You Will Need to Bring to the Social Security Office

Preparing the correct documents is essential for a successful visit to your local Social Security office. The SSA has specific requirements about which documents satisfy each category of proof: identity, age, and citizenship or immigration status.

For proving your identity, the SSA accepts original documents or certified copies. Acceptable identity documents include a valid passport (U.S. or foreign), a state-issued driver's license, a state-issued identification card, a foreign national identification document, or a military identification card. The document must show your name, age or date of birth, and a photo. Expired documents are generally not accepted. If you do not have any of these, the SSA maintains a list of alternative documents that may be used in specific circumstances.

For proving your age, you need an original birth certificate or certified copy. If you were born outside the United States, you may use a foreign birth certificate along with a U.S. passport or green card. Baptism records, hospital birth records, or other documents that show your date of birth may be accepted if an official birth certificate is not available, though you would need to explain why.

For proving citizenship or immigration status, U.S. citizens typically bring a valid U.S. passport or a certified copy of a birth certificate issued by a vital records office. Lawful permanent residents bring their green card (Permanent Resident Card). Foreign nationals authorized to work bring their employment authorization document, visa, or I-94 arrival/departure record along with a passport.

The Social Security Administration recommends bringing original documents when possible rather than photocopies. The SSA staff will examine your documents but will not retain them. You may also be asked to provide your current mailing address and contact information.

According to SSA processing data, incomplete documentation is one of the most common reasons applications are delayed or denied. Bringing all required documents on your first visit significantly increases the likelihood of receiving your SSN card within the standard processing timeframe, which typically ranges from one to two weeks.

Practical Takeaway: Create a checklist based on your specific situation (citizen, permanent resident, or work-authorized noncitizen) and gather all documents before your office visit. Making one trip with complete documents is more efficient than making multiple trips.

Locating Your Nearest Social Security Office and Scheduling Your Visit

The Social Security Administration operates over 1,200 field offices across the United States, plus additional locations in U.S. territories. Finding your nearest office and understanding visit procedures is an important planning step.

You can locate your nearest Social Security office by visiting the SSA's office locator tool on their official website at ssa.gov. The locator allows you to search by city, state, or ZIP code. Each office listing provides the street address, phone number, hours of operation, and services offered at that location. Some offices have limited hours or services, so confirming details before visiting prevents unnecessary trips.

The SSA operates most offices Monday through Friday during standard business hours, typically 9 a.m. to 4 p.m., though hours vary by location. Some offices stay open until 5 p.m. on certain days. A small number of offices offer Saturday hours in select locations. Holiday closures follow the federal government calendar.

You have two primary options for visiting a Social Security office: with an appointment or as a walk-in. Making an appointment through the SSA website or by calling 1-800-772-1213 is recommended because it reduces wait times. The phone line is available Monday through Friday, 7 a.m. to 7 p.m. Eastern Time. You can also create a my Social Security account online and request an appointment through that account if you have access to email.

Walk-in visits are permitted at most offices, but you may face substantial wait times, sometimes several hours. During peak times (mid-morning and mid-month), offices tend to be busier. Visiting early in the morning, early in the week, or early in the month generally means shorter waits.

Processing times for SSN requests typically range from one to two weeks from the date you visit the office. The SSA will send your card by mail to the address you provide. If you need your SSN sooner, you may visit the office again and request a Social Security Number Verification Letter, which documents your number even if your card has not arrived.

Practical Takeaway: Schedule an appointment rather than walk in if your schedule allows. Make the appointment at a time when you can bring all required documents without rushing, as forgotten documents mean you cannot complete the process that day.

What Happens During Your Visit to the Social Security Office