Check your Social Security card if you have it
Look at tax returns, W-2s, or 1099s
Check pay stubs or payroll records
Review bank, loan, or insurance documents that may have it on file
Check government documents or benefit letters that list it
Create or sign in to your my Social Security account if you have one
Contact your employer’s HR or payroll department
Contact the Social Security Administration at 1-800-772-1213
Visit a local Social Security office with identification
If you think your number was lost or stolen, place a fraud alert and monitor your credit reports