Novomykolaivka is a village in Ukraine, in Khotin settlement hromada, Sumy Raion, Sumy Oblast. Until 2016, the local government body was .
The village of Novomykolaivka is located at a distance of up to 2 km from the villages of Vodolahy, Volodymyrivka, Oleksiivka and the village of Varachyne. A drying stream with a dam flows through the village.
On June 12, 2020, in accordance with the Resolution of the Cabinet of Ministers of Ukraine No. 723-r "On the Determination of Administrative Centers and Approval of Territories of Territorial Communities of Sumy Region", it became part of the Khotin settlement hromada.
On July 19, 2020, as a result of the administrative-territorial reform and liquidation of the , the village became part of the newly formed Sumy Raion.
On July 16, 2024, Russian troops shelled the village. 5 explosions were recorded, probably from a 120 mm mortar.
Russian forces first entered the village on 4 July 2025. Russian forces captured the village on the same day. On 8 July 2025, Ukrainian forces launched a counterattack on the settlement, recontesting the village. The Russians recaptured the settlement of 19 July 2025. On 31 December 2025, Deep State UA confirmed that Russian forces captured Novomykolaivka.
According to the 2001 Ukrainian census, the village's population was 136 people. The main languages of the village were: