Kaipara District is a territorial authority district in the Northland Region of New Zealand. Kaipara District was formed through the 1989 New Zealand local government reforms and was constituted on 1 November 1989. It was made up of five former boroughs and counties: all of Hobson County, Dargaville Borough, Otamatea County, and parts of Rodney County …Kaipara District is a territorial authority district in the Northland Region of New Zealand. Kaipara District was formed through the 1989 New Zealand local government reforms and was constituted on 1 November 1989. It was made up of five former boroughs and counties: all of Hobson County, Dargaville Borough, Otamatea County, and parts of Rodney County and Whangarei County. In addition, it took over the functions of the Raupo Drainage Board, Kaiwaka Reserve Board, and the Pahi Reserve Boards.