The capital of Tecuci County was the town of Tecuci .

Tecuci County was initially divided administratively into three districts (plăși):
Plasa Homocea, headquartered at Homocea
Plasa Ivești, headquartered at Ivești
Plasa Podu Turcului, headquartered at Podu Turcului
Subsequently, the territory was reorganized into five districts:
Plasa Găiceana, headquartered at Găiceana
Plasa Brăhășești, headquartered at Brăhășești
Plasa Ivești, headquartered at Ivești
Plasa Podu Turcului, headquartered at Podu Turcului
Plasa Tecuci, headquartered at Tecuci
The capital of Tecuci County was the town of Tecuci . 
Tecuci County was initially divided administratively into three districts (plăși):
Plasa Homocea, headquartered at Homocea
Plasa Ivești, headquartered at Ivești
Plasa Podu Turcului, headquartered at Podu Turcului
Subsequently, the territory was reorganized into five districts:
Plasa Găiceana, headquartered at Găiceana
Plasa Brăhășești, headquartered at Brăhășești
Plasa Ivești, headquartered at Ivești
Plasa Podu Turcului, headquartered at Podu Turcului
Plasa Tecuci, headquartered at Tecuci
Tecuci County