[2] Roman County covered 1,880 km2[1] and was located in the central-north-eastern part of Greater Romania in the center of Moldavia.

[1] Administratively, in 1930, Roman County was divided into two districts (plăși):[1] Later, Plasa Miron Costin was divided into two districts: According to the census data of 1930, the county numbered 151,550 inhabitants, ethnically 90.7% Romanians, 4.7% Jews, 2.3% Romanies, 1.4% Hungarians, as well as other minorities.

From a religious point of view, the population consisted of 73.2% Eastern Orthodox, 21.4% Roman Catholic, 4.9% Jewish, as well as other minorities.

The urban population consisted of 71.9% Romanians, 20.6% Jews, 2.1% Romanies, 1.4% Germans, 1.3% Hungarians, as well as other minorities.

From a religious point of view, the urban population consisted of 73.8% Eastern Orthodox, 20.9% Jewish, 3.7% Roman Catholic, as well as other minorities.