| Official Name: | Județul Dorohoi |
| Settlement Type: | County (Județ) |
| Subdivision Type: | Country |
| Subdivision Name: | Romania |
| Subdivision Type2: | Historic region |
| Subdivision Name2: | Moldavia |
| Subdivision Type3: | County seat (Reședință de județ) |
| Subdivision Name3: | Dorohoi |
| Leader Title: | Prefect |
| Established Title: | Established |
| Established Date: | 1859 |
| Established Title2: | Ceased to exist |
| Established Date2: | Administrative reform of 1950 |
| Area Total Km2: | 2846 |
| Population As Of: | 1930 |
| Population Total: | 211354 |
| Population Density Km2: | auto |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
Dorohoi County, with its seat at Dorohoi, was a subdivision of the Kingdom of Romania and located in the region of Moldavia.
The county was located in the northeastern part of Greater Romania, in the north-eastern extremity of the Moldavia region. Today the territory of the former county is split between Romania (north Botoșani County, with an area of 2,542 km2) and Ukraine (Hertsa region, with an area of 304 km2). It bordered northwest with Cernăuți County, to the north and east with Hotin County, south Botoşani County, southwest with Suceava County, and west with Rădăuți County.
The county comprised five cities: Dorohoi, Darabani, Herța, Mihăileni and Săveni.
Administratively, Dorohoi County was originally divided into three districts (plăși):[1]
Subsequently, two new districts were established:
From 1941 to 1944, Dorohoi County was part of the Bukovina Governorate.
According to the 1930 census data, the county population was 211,354 inhabitants, of which 92.1% were ethnic Romanians, 7.0% were ethnic Jews, as well as other minorities. From the religious point of view, 92.4% were Eastern Orthodox, 7.0% Jewish, 0.3% Roman Catholic, as well as other minorities.
In 1930, the county's urban population was 43,707 inhabitants, 69.3% Romanians, 29.1% Jews, 0.6% Germans, as well as other minorities. In the urban area, languages were Romanian (71.1%), Yiddish (27.4%), German (0.6%), as well as other minorities. From the religious point of view, the urban population was composed of Eastern Orthodox (69.1%), Jewish (29.3%), Roman Catholic (0.9%), as well as other minorities.