Hornostaivka (Ukrainian: Горностаївка) is a village in Henichesk Raion, Kherson Oblast, southern Ukraine.

Hornostaivka belongs to the Novotroitske settlement hromada, one of the hromadas of Ukraine.

Until 18 July, 2020, Hornostaivka belonged to Novotroitske Raion.

The raion was abolished in July 2020 as part of the administrative reform of Ukraine, which reduced the number of raions of Kherson Oblast to five.

This article about a location in Kherson Oblast is a stub.