Nyzhniohirskyi Raion (Ukrainian: Нижньогірський район, Russian: Нижнегорский район, Crimean Tatar: Seyitler rayonı) is one of the 25 regions of the Autonomous Republic of Crimea, a territory recognised by a majority of countries as part of Ukraine and incorporated by Russia as the Republic of Crimea.

The administrative centre of the raion is the urban-type settlement of Nyzhniohirskyi.

[1] In July 2020, Ukraine conducted an administrative reform throughout its de jure territory.

This included Crimea, which was at the time occupied by Russia, and is still ongoing as of October 2023.

Nyzhnohirskyi Raion was abolished, and its territories to become a part of Bilohirsk Raion, but this has not yet been implemented due to the ongoing Russian occupation.