In 1938, the county was disestablished and incorporated into the newly formed Ținutul Suceava,[2] but it was re-established in 1940 after the fall of Carol II's regime.

In World War II, the county was part of the Bukovina Governorate and was later invaded and occupied by Soviet forces.

According to the 1930 census data, the county population was 94,816, ethnically divided among Romanians (61.3%), Germans (20.2%), Jews (8.2%), Ukrainians (6.7%), Poles (1.8%), as well as other minorities.

[3] From the religious point of view, the population consisted of Eastern Orthodox (68.2%), Roman Catholic (16.9%), Jewish (8.2%), Lutheran (5.5%), as well as other minorities.

[4] The four urban localities of the county as of the 1930 census were: Câmpulung Moldovenesc (population 10,071), Vatra Dornei (9,826), Gura Humorului (6,042), and Vama (5,315).