Nizhnedevitsky Uyezd (Russian: Нижнедевицкий уезд) was one of the subdivisions of the Voronezh Governorate of the Russian Empire.

It was situated in the northwestern part of the governorate.

At the time of the Russian Empire Census of 1897, Nizhnedevitsky Uyezd had a population of 167,183.

Of these, 98.9% spoke Russian and 1.1% Ukrainian as their native language.

This Russian history–related article is a stub.