The Ialomița River crosses the county from West to East about the middle.

Subsequently, three new districts were added:According to the 1930 census data, the county population was 293,352 inhabitants, ethnically divided as follows: 96.6% Romanians, 2.5% Romanies, 0.2% Jews, as well as other minorities.

From the religious point of view, the population was 99.3% Eastern Orthodox, 0.2% Jewish, 0.1% Roman Catholic, as well as other minorities.

In 1930, the county's urban population was 34,260 inhabitants, comprising 90.2% Romanians, 6.0% Romnanies, 1.3% Jews, as well as other minorities.

From the religious point of view, the urban population was composed of 97.4% Eastern Orthodox, 1.4% Jewish, 0.5% Roman Catholic, as well as other minorities.