Denys Oleksandrovych Nahnoynyi (; born 3 February 2002) is a Ukrainian professional footballer who plays as a defender for Kudrivka, on loan from Metalist 1925.
Born in Varva, Nahnoynyi is a product of the neighbouring Yevropa Pryluky and UFK-Metal Kharkiv youth sportive school systems.
In August 2019 he was signed by Zorya Luhansk and he made his league debut for the club as a second-half substitute against Oleksandriya on 9 May 2021.
On 4 July 2024, Nahnoynyi joined Metalist 1925 Kharkiv on a four-year contract.
On 31 July 2025 he was loaned to Kudrivka in Ukrainian Premier League.