City of Naperville data breach

What we know

The City of Naperville is a municipal government entity responsible for providing essential public services, infrastructure management, and administrative oversight to its residents. As a local government body, the City typically collects and stores sensitive personal information including Social Security numbers, residential addresses, driver’s license numbers, and financial payment data related to utility billing, taxes, and permit processing. This data breach was officially reported to the Indiana Attorney General in 2025, confirming that unauthorized parties may have accessed systems containing resident records. If you received a formal data breach notification letter, it indicates that your personal information was potentially compromised during this incident. We recommend reviewing the letter carefully to understand the specific scope of the exposure and the identity protection services being offered by the City.

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