| Native Name: | Нижнедевицкий уезд |
| Conventional Long Name: | Nizhnedevitsky Uyezd |
| Subdivision: | Uezd |
| Nation: | Russian Empire and RSFSR |
| Capital: | Nizhnedevitsk |
| Year Start: | 1779 |
| Year End: | 1928 |
| Image Map Caption: | Nizhnedevitsky Uyezd in Voronezh Governorate |
| Stat Year1: | 1897 |
| Stat Area1: | 3742 |
| Stat Pop1: | 167,183 |
Nizhnedevitsky Uyezd (ru|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. Its administrative centre was Nizhnedevitsk.
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.[1]