In February 1963, during the abortive administrative reform by Nikita Khrushchev, Kirovsky and Penovsky Districts were merged into Ostashkovsky District. On January 12, 1965 Selizharovsky District (which occupied the area of Kirovsky District) was re-established.
In February 1963, during Nikita Khrushchev's ill-conceived attempt to reform the administrative setup, Kirovsky and Penovsky Districts were merged into Ostashkovsky District. Subsequently, on January 12, 1965, Selizharovsky District was re-established in its original area.