Chicago police and Illinois State Police arrested Adam A. Dabash of Villa Park Monday morning.
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State police said Dabash also left letters at the governor's home on two occasions in August.
Dabash is being held at the Chicago Police Department's 18th District lockup until his pretrial conditions have been set by a judge, police said.
SEE MORE: IL Gov. JB Pritzker's Chicago home damaged by vandal throwing rocks; suspect in custody
State police said troopers that are part of the Governor's Executive Protection Unit responded to the home around 9:40 a.m. Monday when someone threw rocks, breaking three windows.
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The troopers, along with Chicago police, searched the area. CPD located and arrested Dabash.
Illinois State Police said the governor and his wife were home at the time of the incident, but no one was hurt.
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