[1] Population: 3,464 (2022 estimate)[2] Kozelschyna is also a railway station, and located close to the highway M22-E584.

With the formation, in 1802, of Poltava Governorate, Kozelschyna was attached to that latter in 1803, first in the newly Kobelyatsky County.

From February 1932 to September 1937, Kozelschyna was part of the Kharkiv region (on 26 April 1933, the Bryhadyrivskyy district was renamed Kozelshchina).

[5] Among the attractions in Kozelschyna, the cathedral and monastery of the Nativity of the Virgin, built in 1882 by VI and SM Kapnist, as a thankful gift for the recovery of their daughter Mary from serious illness.

In 1929, the monastery was closed and the cathedral was turned into a theater, in cells located bio-engineering school, hospital etc.