Questions & Answers about Idara iko mjini.
Iko is the form used to say that something is located somewhere.
In Idara iko mjini, iko means something like is located / is found / is in a place.
So this sentence is built like:
- Idara = the department / office
- iko = is located
- mjini = in town / in the city
This is a very common pattern in Swahili for talking about location.
Because ni and iko do different jobs.
- ni is usually used for identity or classification:
- Huyu ni mwalimu. = This is a teacher.
- iko is used for location:
- Idara iko mjini. = The department is in town.
So for where something is, iko is the natural choice, not ni.