NZ Bank?
 

I want to deposit some money in an NZ bank.
Which bank will I find in most towns?

Banking on it?
 

KiwiBank Kiwibank has the most branches (311), is in most Post Offices, but it might not be as useful as it has no overseas associate banks.
Otherwise Westpac Westpac New Zealand indexor ANZ ANZ Home Page(also has branches in Australia).
KiwiBank has the best customer satisfaction rating also.

Regards

Nigel in NZ