US Office of Personnel Management
Disclosed Jul 9, 201511 years ago21,500,000 affectedConfirmed
Background investigation files of 21.5 million people stolen from OPM
OPM concluded that background investigation records including Social Security numbers of 21.5 million people were stolen: 19.7 million applicants and 1.8 million others such as spouses. About 5.6 million records included fingerprints.
What is known
| People affected | 21,500,000 (as reported by the organization) |
|---|---|
| Disclosed | Jul 9, 2015 |
| Discovered | Jun 2015 |
| Attack | Hacking |
| Data exposed | Names, Social Security numbers, Biometrics, Credentials and tokens, Employment, Addresses, Dates of birth |
| Sector | Government · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| OPM: Cybersecurity Incidentsweb.archive.org · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| Researchtotal | Jul 9, 2015 | 21,500,000 |
Other breaches at US Office of Personnel Management
| Breach | Affected | ||||
|---|---|---|---|---|---|
| OPM personnel records of 4.2 million federal employees stolenJun 4, 201511 years agoHacking | Jun 4, 201511 years ago | Hacking | Government | Confirmed | 4.2M |
History of this record
- 2026-09-25 · added · seed source
First seen 2026-09-25 (Research), confirmed by Research. Record counts are as reported. Not legal advice.