Neighbours of the county were Odessa Oblast of USSR to the east, countries of Tighina to the north and Ismail to the south and Cahul to the west. She was situated to Black Sea from south-east. The county was created after end of World War I.
According to the Romanian census of 1930 the population of Cernăuţi County was 340,459, of which 20.9% were ethnic Bulgarians, 20.5% ethnic Ukranians, 18.5% Romanians, 17.3% Russians 16.3% ethnic Germans, 3.3% Jews, 3.3% Gagauz and 0.1% Armenians. Classified by religion: 79.0% were Orthodox Christian, 16.3% Lutheran, 4.7% Jews.