This is the 495th most frequent Croatian word.
općina
A municipality or local administrative unit in Croatia.
In this context, 'općina' refers to the local government office or administrative building where municipal work takes place.
Zaposlio se u općini kao pravnik.
He got a job in the municipality as a lawyer.
In this sentence, 'općina' refers to the municipal organization or administrative body responsible for local governance.
Općina je organizirala lokalni sajam prošlog vikenda.
The municipality organized a local fair last weekend.
Here, 'općina' refers to the geographical area governed by the municipality.