The Gaysin uezd[a] was a county (uezd) of the Podolian Governorate of the Russian Empire, with its administrative centre in Gaysin (modern-day Haisyn).

The area of the Gaysin uezd covered the area of modern-day Haisyn Raion.

The subcounties (volosts) of the Bratslav uezd in 1912 were as follows:[1] At the time of the Russian Empire Census on 28 January [O.S.

15 January] 1897, the Gaysin uezd had a population of 248,142, including 123,305 men and 124,837 women.

The majority of the population indicated Little Russian[b] to be their mother tongue, with a significant Jewish speaking minority.