Confirmed breach

National Public Data data breach

USUnited States

National Public Data (United States) notified the Wisconsin Department of Agriculture, Trade and Consumer Protection and the California Attorney General of a data breach on 12 August 2024. It affected 133,957,569 accounts. Exposed: Social Security numbers, Government ID numbers, Email addresses, Phone numbers, Dates of birth and Names and more.

Status: Confirmed breach
People affected: 133,957,569 accounts
Reported: 12 August 2024

What was exposed

Social Security numbers
Government ID numbers
Email addresses
Phone numbers
Dates of birth
Names
Addresses
Genders

What changed since it was first reported

29 October 2026 Confirmed breach, 133,957,569 accounts (Have I Been Pwned)

Sources

Official notices are read by code from the regulator’s own register. Breach databases are read by code. More notices to Wisconsin, California. · Corrections and changes

If National Public Data had your data

Look for National Public Data’s own notice or letter: it should say what of yours was involved. Keep it.
An ID number cannot be changed, so lock it: a credit freeze or fraud alert in the US, a credit warning (kreditadvarsel) on borger.dk in Denmark, Cifas protective registration in the UK.
Expect scams that use your details: calls, texts or emails pretending to be National Public Data, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

More breaches in United States

Every breach in United States →

From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.