Mike Sabin National Winston Peters New Zealand First A by-election was held in the Northland electorate on 28 March 2015.

The seat had been vacated following the resignation of Mike Sabin of the National Party from the House of Representatives on 30 January 2015.

In December 2014 New Zealand media reported that Northland MP Mike Sabin was under investigation by police over an assault complaint.

The major communities include Kaitaia, Russell, Kerikeri, Kaikohe, Dargaville and Mangawhai Heads.

Among general electorates in 2013, Northland had the second-lowest median family income ($51,400), and the lowest proportion of wage and salary workers (31.5%).

[13] Labour leader Andrew Little opined that Peters, aged 69 at the time of the election, would be too old for many voters to select as their new electorate MP.