The The City of Naperville, Illinois Data Breach: Incident Facts and Free Case Review

The City of Naperville, Illinois is a municipal government entity responsible for providing public services, maintaining infrastructure, and managing administrative records for its residents. In the course of these operations, the city typically collects and stores sensitive personal information, including government identification numbers, tax records, utility account details, and employment-related data for municipal staff. This data breach was officially reported to the New Hampshire Attorney General in 2025, confirming that unauthorized access to certain systems occurred. If you have received a formal data breach notification letter, it indicates that your personal information may have been involved in this incident. This notification is intended to provide you with transparency regarding the event and guidance on the necessary steps to protect your identity and financial security.

Received a The City of Naperville, Illinois notification letter? Find out in minutes if you qualify for compensation.

Free case review

State: New Hampshire
Reported: July 14, 2025

Received the The City of Naperville, Illinois notification letter? The The City of Naperville, Illinois case file tracks this filing.

What to do if you were affected

These general steps can help limit the risk of identity theft and fraud after any data breach.

Stay alert to targeted scams
Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.
Keep your notification letter
Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.

Related data breach cases

Browse all New Hampshire data breaches View the full case directory