New Zealand Electoral Rolls
The Electoral Rolls are brought up to date every 3 years ready for the Elections. These are not available on line, with the exception of the Otago Nominal Indexes (also known as ONI) and are presently up to 1876. This includes the Electoral Rolls and Street Directories for Otago and Southland. from 1840-1876, and will be added to as the work progresses.
You can view this site at http://marvin.otago.ac.nz/oni/default.html
Index to Places and Streets are regularly updated and available at this site www.linz.govt.nz
As Boundaries change Online Maps of the Electorate Boundaries are available at - www.elections.org.nz