Check your Social Security card (it shows your Social Security number).
Locate your most recent Social Security-related documents (award letters, benefit statements, or tax documents).
Review IRS documents (W-2, 1099, or SSA-1099) that may display your Social Security number.
Check your paystub or employment documents if they list your Social Security number.
Log into your Social Security account at https://www.ssa.gov/myaccount/ (sign in to view statements that may include your number).
Contact the Social Security Administration at 1-800-772-1213 to request help finding your number.
Visit a local Social Security office and bring required identification documents.
If you suspect identity theft or your number is being used incorrectly, contact SSA and file a report at https://www.identitytheft.gov/.