Oni (Georgian: ონის მუნიციპალიტეტი) is a district of Georgia, in the region of Racha-Lechkhumi and Kvemo Svaneti.

To the south Oni Municipality borders the Sachkhere Municipality in the Imereti region, and to the southeast de jure has border with the Java Municipality in the Shida Kartli region.

In the north to the east it is limited the Georgia–Russia border primerely with Republic of North Ossetia-Alania and a short section with the Republic of Kabardino-Balkaria.

Until 1917, the actual Oni municipality was a part of the Racha uyezd in the Kutaisi Governorate, from 1917 to 1928 it was a part of Racha uyezd, from 1929, it was a part of Racha-Lechkhumi uyezd and from 1930, it became an independent rayon.

Sergo Khidesheli of Georgian Dream was elected mayor.