Pennington County, South Dakota, Responds to Cybersecurity Incident with Partial Office Closures Pennington County, South Dakota, has temporarily closed most of its public-facing offices on Monday following a cybersecurity incident impacting portions of its network. The closures are intended to allow staff to assess the situation and restore affected systems securely. While critical services remain operational including 911 dispatch, the county jail, juvenile services, the Care Campus, and other public safety operations some functions have been disrupted. Court operations, the 24/7 Program, and early voting at the Auditor’s Office will continue as scheduled. Residents needing vehicle registration services can still access South Dakota’s online portal or self-service kiosks. The full scope of the incident is still under investigation, with county officials working alongside the South Dakota National Guard Cyber Incident Response Team, the South Dakota Fusion Center, the Cybersecurity and Infrastructure Security Agency (CISA), and other partners. Due to the ongoing nature of the investigation, limited verified details have been released. The county plans to provide its next public update by 11 a.m. on Monday.