Duki () is a district in the Balochistan province of Pakistan. Pashto is the most spoken language in Duki District.
As of the 2023 census, Duki district has 43,059 households and a population of 205,044. The district has a sex ratio of 109.66 males to 100 females and a literacy rate of 44.18%: 53.91% for males and 33.43% for females. 67,333 (32.84% of the surveyed population) are under 10 years of age. 9,783 (4.77%) live in urban areas.
At the time of the 2023 census, 93.27% of the population spoke Pashto, 4.85% Balochi, and 0.69% Brahui as their first language.