United States Postal Service Data Breach History
WebsiteThe United States Postal Service (USPS) is an independent federal agency that delivers mail and packages to every address in the United States.
This page shows all data breaches of United States Postal Service. View the complete breach timeline, records exposed, root causes, and AI breach risk score. BreachHistory tracks disclosed data breaches worldwide.
Data Breach Timeline — All United States Postal Service Breaches
- 2018 2018 — United States Postal Service: Poor security / misconfiguration, 60000000 records 60.0M records Share
- 2018 2018 — 60M records Unknown records Share
- 2007 2007 — United States Postal Service: Employees' names, Social Security numbers and other… 3.0K records Share
United States Postal Service Data Breach Summary
This page tracks the United States Postal Service data breach history and cybersecurity incidents affecting United States Postal Service (United States). BreachHistory currently indexes 3 publicly disclosed or catalogued incidents spanning 2007 through 2018, with approximately 60.0 million records reported as exposed across all indexed events. These totals may include overlapping datasets or third-party estimates and should not be interpreted as unique affected users.
The United States Postal Service breach timeline includes major data breaches, cyber attacks, data leaks, credential exposures, API abuse, and other security incidents. Each incident provides details on the estimated records exposed, attack method, affected data types, and supporting public sources. Currently, 0 incidents are company-confirmed.
Largest United States Postal Service Data Breaches
The largest indexed incidents include the 2018 — United States Postal Service: Poor security / misconfiguration, 60000000 re… and the 2007 — United States Postal Service: Employees' names, Social Security numbers and…. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by United States Postal Service or a regulator. Below is the list of large data breaches:
- 2018 2018 — United States Postal Service: Poor security / misconfiguration, 60000000 records — about 60.0M records exposed · Catalogued incident
- 2007 2007 — United States Postal Service: Employees' names, Social Security numbers and other… — about 3.0K records exposed · Catalogued incident
What Information Was Exposed?
Depending on the incident, exposed data may include email addresses, names, physical addresses, health and medical (PHI) records, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.
United States Postal Service Data Breach 2026
At the time of this update, no United States Postal Service data breach has been catalogued for 2026. New incidents are added as official disclosures, regulatory filings, or credible cybersecurity reports become available.
What To Do If You Were Affected
If you believe your account may have been involved in a United States Postal Service data breach, change any reused passwords, enable multi-factor authentication (MFA), monitor your account for suspicious activity, and be cautious of phishing emails or fake breach notifications.
This United States Postal Service breach history is maintained by BreachHistory using public disclosures, regulatory filings, security research, and clearly labelled third-party claims. For the complete breach timeline, records exposed, incident details, and AI Breach Risk Score, explore the sections on this page.