During 1998-2001, the raion went through an administrative reorganization. Namely, the city of Starokostiantyniv was removed from the raion's jurisdiction and its status was upgraded to that of a city of oblast significance under the jurisdiction of Khmelnytskyi Oblast. Even though it was no longer a part of the raion, Starokostiantyniv still served as its administrative center. At the same time, three new village councils were also established.
