Kozelshchyna Raion

Kozelshchyna Raion (Козельщинський район; translit.: Kozelshchynskyi raion) was a raion (district) in Poltava Oblast in central Ukraine. The raion's administrative center was the urban-type settlement of Kozelshchyna. The other urban-type settlement in the raion was Nova Haleshchyna (Нова Галещина). The raion was abolished and its territory was merged into Kremenchuk Raion on 18 July 2020 as part of the administrative reform of Ukraine, which reduced the number of raions of Poltava Oblast to four. The last estimate of the raion population was

At the time of disestablishment, the raion consisted of two hromadas:
 * Kozelshchyna settlement hromada with the administration in Kozelshchyna;
 * Nova Haleshchyna settlement hromada with the administration in the urban-type settlement of Nova Haleshchyna.

Important rivers within the Kozelshchyna Raion include the Psel.