Green County Wisconsin data breach

What we know

Green County Wisconsin appears to be a government entity responsible for managing public records, tax assessments, and social services for its residents. In the course of these operations, the county collects and maintains sensitive personal information, including government identification numbers, tax records, and residential contact details. This data breach was officially reported to the Indiana Attorney General in 2025, confirming that unauthorized access to these systems occurred. If you have received a formal data breach notification letter, it indicates that your personal information was likely contained within the compromised files. We recommend reviewing the letter carefully to understand the specific scope of the incident and the identity protection services being offered to those affected by this security event.

See every breach reported in Indiana or read what to do after a ransomware attack.