Some see these types of hacks as simply a nuisance, though in some instances, they have been disruptive to work and government life.
The message was displayed on the the Brookhaven, LI homepage, as well as the Ohio Department of Rehabilitation and Corrections, Casino Control, Ohio Office of Workforce Transformation. It includes the phrase "I Love Islamic state".
The websites in OH hacked with the message also include that of first lady Karen Kasich.
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Tom Hoyt, chief communications officer for Ohio's Department of Administrative Services, was among OH officials who confirmed the hack.
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The pro-ISIS group, which USA Today has described as a group of "anti-Israeli Arab teenagers", has been behind other cyber attacks in recent months, including sites across France, Israel, and other countries. "We also are working with law enforcement to better understand what happened". The websites are expected to run sometime Monday, he told the Associated Press.
It was not immediately clear who the group was or whether it was genuinely affiliated with ISIS.
According to VICE, Team System DZ has hacked numerous random websites, including the University of New Brunswick's student union site and a Canadian food truck's sandwich site.
News 5 has reached out to the Ohio Department of Rehabilitation and Corrections for comment but have not yet heard back. "Wake up freedom-loving Americans", he wrote.