The Old McHenry County Courthouse, where the McHenry County government office was previously located, was recognized by the National Park Service as part of the National Register of Historic Places, which is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance
Until 1973 McHenry County government office were located in the Old Courthouse. On November 1, 1974, it was recognized by the National Park Service on the National Register of Historic Places. The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance. 
