Check your Social Security card
Review tax returns, W-2s, or 1099s
Look at pay stubs or HR/payroll records
Check bank, loan, or credit account documents where you previously provided it
Review immigration, benefits, or government records that may include it
Create or sign in to your my Social Security account if you need official records
Contact your employer’s HR or payroll department if they have it on file
Contact the Social Security Administration if you need help verifying your number
Check old personal records, such as a safe, filing cabinet, or secure document folder