This is the 707th most frequent Romanian word.
județului
"Județului" means "of the county" in English.
Here, 'județului' is used in a possessive form to specify 'the county's map' or 'the map of the county'.
Harta județului arată multe obiective turistice interesante.
The map of the county shows many interesting tourist attractions.
In this context, 'județului' specifies 'of the county', attributing the people mentioned to their geographic location.
Locuitorii județului sunt foarte primitori și prietenoși.
The inhabitants of the county are very welcoming and friendly.
The word 'județului' is a genitive form indicating possession, referring to 'the county's' in the sentence.