Hillsboro Municipal Airport

The specific reason is not officially documented, but it is presumed to be economic and logistical. As a small airport with a single, short (2,200 ft), unpaved turf runway, it likely faced declining use and financial unsustainability as general aviation aircraft became more advanced. The development of the nearby and better-equipped Litchfield Municipal Airport (K3LF), with its paved runway, would have also drawn traffic away, making the Hillsboro field redundant.

The site of the former airport has been completely redeveloped. It is now the location of the Hillsboro Correctional Center, a medium-security state prison operated by the Illinois Department of Corrections. The prison opened in 1996, and its construction permanently obliterated all traces of the former runway, taxiways, and any associated airport structures.

Hillsboro Municipal Airport was a small general aviation airfield serving the local community of Hillsboro, Illinois, and surrounding Montgomery County. Active from at least the early 1950s, it was a typical example of a post-WWII small-town grass strip. Its operations primarily consisted of serving private pilots for training, recreation, and personal business travel in light aircraft. It may have also supported agricultural aviation (crop dusting). Its significance was purely local, providing basic aviation access to the community before its operations were consolidated at other regional airports.

Zero. There are absolutely no plans or prospects for reopening the airport. The land has been permanently and irreversibly repurposed for a major state correctional facility, making any return to aviation use impossible.