Kreis Ösel (Estonian: Kuressaare kreis, Russian: Эзельский уезд) was one of the nine subdivisions of the Governorate of Livonia of the Russian Empire.
It was situated in the northwestern part of the governorate (in present-day western Estonia).
The territory of Kreis Ösel corresponds to the present-day Saare County.
[1] At the time of the Russian Empire Census of 1897, Kreis Ösel had a population of 60,263.
Of these, 95.5% spoke Estonian, 2.6% German, 0.9% Russian, 0.4% Swedish, 0.4% Ukrainian, 0.1% Yiddish, 0.1% Latvian and 0.1% Polish as their native language.