| Official Name: | Județul Tecuci |
| Settlement Type: | County (Județ) |
| Subdivision Type2: | Historic region |
| Subdivision Type3: | County seat (Reședință de județ) |
| Established Title: | Established |
| Established Title2: | Ceased to exist |
| Established Date2: | Administrative reform of 1950 |
| Area Total Km2: | 2408 |
| Population As Of: | 1930 |
| Population Total: | 156405 |
| Population Density Km2: | auto |
| Utc Offset: | +2 |
| Utc Offset Dst: | +3 |
Tecuci County was a county (Romanian: județ) in the Kingdom of Romania, in the historical region Moldavia. The county seat was Tecuci.
The county was located in the central-eastern part of Greater Romania, in the south of Moldavia. The county bordered on the east with the counties of Tutova and Covurlui, on the south with the county Râmnicu Sărat, and to the west with the counties Putna and Bacău. Because of its shape, its northern extreme was the meeting point of Bacău and Tutova counties.
The capital of Tecuci County was the town of Tecuci.
Tecuci County was initially divided administratively into three districts (plăși):[1]
Subsequently, the territory was reorganized into five districts:
According to the 1930 census data, the county population was 156,405 inhabitants, 94.9% were Romanians, 2.0% Gypsies, 1.8% Jews, as well as other minorities. From the religious point of view, 96.3% were Eastern Orthodox, 1.9% were Jewish, 1.6% were Roman Catholic, as well as other minorities.
In 1930, the county's urban population was 17,172 inhabitants, 86.5% Romanians, 8.9% Jews, 1.1% Hungarians, 1.0% Gypsies, 0.8% Germans, as well as other minorities. From the religious point of view, the urban population was composed of 88.3% Eastern Orthodox, 9.2% Jewish, 1.3% Roman Catholic, 0.5% Lutheran, as well as other minorities.
The county was disbanded following the fall of the monarchy in Romania and the coming of Communism. It was divided in September 1950 between Regiunea Putna and Regiunea Bârlad, and in 1952 after the merger of the two, it remained part of Regiunea Bârlad. In 1960, its territory was again divided between Regiunea Bârlad and Regiunea Galați, and since 1968, much of its old territory (including the capital) belonged to Galați County, some smaller areas belonging to today's Vrancea County and Bacău County.