
Union County, Ohio, Data Breach
NOTICE: If you received a NOTICE OF DATA BREACH letter from Union County, Ohio, contact the Arnold Law Firm at (916) 777-7777 to discuss your legal options, or submit a confidential Case Evaluation form here. On September 24, 2025, Union County, Ohio began notifying residents and employees of a major cybersecurity incident, revealing that the county’s systems had been compromised in a ransomware attack earlier in 2025. The incident reportedly took place between May 6 and May 18, 2025, during which attackers accessed and extracted sensitive personal and financial data (the “Data Breach”). Approximately, 45,487 people have been affected by the Data Breach. Recently, Union County has begun sending data breach notification letters to those affected and is offering complimentary


