In 1940, it was transferred back to Hungary with the rest of Northern Transylvania under the Second Vienna Award.

Beginning in 1944, Romanian forces with Soviet assistance recaptured the territory and re-established jurisdiction in 1945.

Administratively, Someș County was divided originally into six districts (plăși):[1] Later, a seventh district was added: According to the 1930 census, the county counted 219,335 inhabitants, of which 77.5% were Romanians, 15.4% Hungarians, and 4.8% Jews, and other smaller minorities.

[3] The urban population consisted of 41.3% Romanians, 33.0% Hungarians, 20.1% Jews, 1.7% Armenians, and other smaller minorities.

As a mother tongue in the urban area Romanian predominated (41.4%), followed by Hungarian (36.8%), Yiddish (18.3%), German (1.0%) and others.