Check your Social Security card, tax returns, W-2 forms, and other official records
Log in to your my Social Security account at SSA.gov if you already created one
Review your tax documents in your IRS online account if available
Contact your employer’s payroll or HR department for records that may show it
Contact your bank, insurance provider, or other institutions that may have recorded it
Request a replacement Social Security card from the Social Security Administration if needed
Contact the Social Security Administration directly for help verifying your number
Avoid websites or services that claim to “look up” your Social Security number online