Were you affected by a data breach in Illinois?
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Illinois Data Breaches — Page 3
Browse data breaches affecting Illinois residents in 2026. Stay informed about security incidents and protect your personal information.
Showing 25 breaches affecting Illinois
wjnklaw.com
Discovered Feb 23, 2026
Westervelt, Johnson, Nicoll & Keller, LLC, a law firm based in Peoria, Illinois, experienced a LockBit 5.0 ransomware attack in early 2026.
Strategic Investment Solutions Inc.
Discovered Feb 12, 2026
Strategic Investment Solutions Inc. experienced a data breach in late 2025/early 2026, where personal information, including Social Security numbers, may have been compromised.
Mobexly Breached: 24 GB Data is For Sale
Discovered Feb 8, 2026
Mobexly, a U.S.-based mobile app platform provider, experienced a data breach in February 2026 where 24 GB of data was stolen and offered for sale.
You may be entitled to compensation
1st MidAmerica Credit Union
Discovered Jan 30, 2026
1st MidAmerica Credit Union experienced a data breach in 2025-2026 exposing personal information of over 130,000 individuals.
You may be entitled to compensation
Continental Casualty Company
Discovered Jan 30, 2026
Continental Casualty Company (CNA) experienced a cybersecurity incident in October 2024 that was discovered in January 2025, potentially affecting thousands of individuals.
Nissan Investigates 910GBand Extortion
Discovered Jan 15, 2026
Nissan North America investigated a data breach in 2026 after a ransomware group claimed to have exfiltrated 910GB of data, leading to the exposure of personal and sensitive information for over 220,000 individuals in the US.
You may be entitled to compensation
Avis Rent A Car System LLC
Discovered Jan 15, 2026
Avis Rent A Car System LLC experienced a data breach in early 2026, potentially affecting approximately 500,000 individuals.
You may be entitled to compensation
Hightower Holding, LLC
Discovered Jan 8, 2026
Hightower Holding, LLC experienced a data breach in January 2026 affecting approximately 131,483 individuals.
You may be entitled to compensation
Panera, LLC
Discovered Jan 5, 2026
Panera, LLC experienced a data breach in January 2026, which exposed personal information of approximately 5.1 million customers nationwide.
You may be entitled to compensation
Southern Illinois Dermatology
Discovered Dec 28, 2025
Southern Illinois Dermatology experienced a data breach in late 2025, disclosed in early 2026, affecting approximately 45,000 individuals.
You may be entitled to compensation
Chrysler
Discovered Dec 26, 2025
Chrysler experienced a data breach in late 2025, with the Everest ransomware group claiming to have stolen over 1TB of data affecting customers nationwide.
Orthopaedic Institute of Western Kentucky
Discovered Dec 15, 2025
The Orthopaedic Institute of Western Kentucky experienced a data breach in late 2025/early 2026, leading to the exposure of personal health information and Social Security numbers for approximately 47,000 individuals.
You may be entitled to compensation
Erie Family Health Centers
Discovered Dec 10, 2025
Erie Family Health Centers experienced a data breach in late 2025/early 2026, impacting approximately 570,000 individuals in Illinois.
You may be entitled to compensation
Delta Dental of Virginia
Discovered Dec 1, 2025
Delta Dental of Virginia experienced a data breach in December 2025 that was confirmed in 2026, affecting approximately 146,000 individuals.
You may be entitled to compensation
OB-GYN Associates
Discovered Nov 24, 2025
Southern Illinois Ob-Gyn Associates experienced a data breach in 2026, affecting 38,700 patients.
You may be entitled to compensation
CoVantage Credit Union
Discovered Aug 14, 2025
CoVantage Credit Union experienced a data breach in 2025 due to a vendor incident, the full impact of which is still being determined.
You may be entitled to compensation
Walgreen Co.
Discovered Jul 14, 2025
Walgreen Co. experienced a data breach in 2025 involving the protected health information of 2,708 individuals in Illinois.
You may be entitled to compensation
The Washington Post
Discovered Jul 10, 2025
The Washington Post experienced a regulator-confirmed data breach in 2025 involving unauthorized access to its Oracle E-Business Suite environment. State filings report 9,720 affected individuals, with potentially exposed information including Social Security numbers, financial account data, medical information, and health insurance information.
You may be entitled to compensation
WEL Companies, Inc.
Discovered Jan 30, 2025
WEL Companies, Inc. experienced a data breach in 2025 where personally identifiable employment and regulatory data of 122,960 individuals were reportedly exposed.
You may be entitled to compensation
Southeast Series of Lockton Companies, LLC
Discovered Nov 20, 2024
The Southeast Series of Lockton Companies, LLC data breach was discovered on November 20, 2024, and regulator records identify the incident as affecting approximately one million people. Reported data types include names, dates of birth, Social Security numbers, health information, and medical information.
You may be entitled to compensation
Centers for Medicare & Medicaid Services
Discovered Nov 5, 2024
A data incident involving Medicare.gov accounts operated by the Centers for Medicare & Medicaid Services (CMS) may have impacted approximately 103,000 Medicare beneficiaries, not Aetna, with notifications sent in 2023 or 2024.
Healthcare Services Group, Inc
Discovered Sep 1, 2024
Healthcare Services Group, Inc. experienced a data breach in 2024 that impacted over 624,000 individuals across 48 U.S. states.
You may be entitled to compensation
Landmark Admin, LLC
Discovered May 13, 2024
Landmark Admin, LLC experienced a 2024 data breach affecting approximately 1.6 million people. Reported exposed information included Social Security numbers and financial information; the incident involved Landmark Admin’s administration of information for Liberty Bankers Insurance Group and Accendo Insurance Company.
Medusind, Inc.
Discovered Dec 29, 2023
Medusind, Inc. experienced a regulator-confirmed data breach on December 29, 2023, involving personal, medical, insurance, payment, and government-identification information. The number of affected individuals has not been publicly identified in the sources reviewed.
Trinity Health
Discovered Oct 1, 2023
Trinity Health experienced a potential data breach in March 2026, which may have exposed patient identifiers and clinical information.
You may be entitled to compensation
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