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State Highway 12
State Highway 12
Route information
	Maintained by NZ Transport Agency
Length	217 km (135 mi)
Major junctions
North end	SH 1 at Ōhaeawai
	SH 15 north (Te Pua Road) near Kaikohe ; SH 15 south (Mangakahia Road) at Kaikohe ; SH 14 (Jervois Street) at Dargaville
South end	SH 1 at Brynderwyn
Location
Country	New Zealand
Primary; destinations	Dargaville, Kaikohe, Hokianga Harbour
Highway system
	New Zealand state highways; Motorways and expressways; List;

State Highway 12 (SH 12) is a New Zealand state highway in the far north of the North Island. It connects with SH 1 at both its northern and southern end. It runs close to the west coast of the Northland Region of New Zealand.

Route

SH 12 starts in Ōhaeawai, running initially southwest to Kaikohe, during which it shares a short section of road with SH 15. It then turns roughly westwards, reaching the Hokianga harbour at its Omanaia River arm. It continues west, reaching Opononi and Ōmāpere at the mouth of the harbour, before turning southeast to parallel the coast. The highway briefly follows the valley of the Waimamaku River before winding through the Waipoua Kauri Forest, then follows the valley of the Kaihu River to Dargaville. At Dargaville, the highway meets SH 14, and continues southeastwards along the edge of the Wairoa River to Ruawai before turning eastwards. It briefly skirts the edge of the Arapaoa River arm of the Kaipara Harbour before passing through Paparoa and Maungaturoto and ending at its junction with SH 1 at Brynderwyn, 15 km (9.3 mi) south of Waipu.^[1]^{[unreliable source?]}^[when?]

Major intersections

Territorial authority	Location	km	mi	Destinations	Notes
Far North District	Ohaeawai	0	0.0	SH 1 north – Kaitaia, Cape Reinga SH 1 south – Whangārei	SH 12 begins 35°21′07″S 173°52′55″E / 35.351953°S 173.882060°E / -35.351953; 173.882060
	Kaikohe	8.7	5.4	SH 15 (Te Pua Road) – Okaihau, Kaitaia	SH 12/SH 15 concurrency begins
	Kaikohe	10.3	6.4	SH 15 (Mangakahia Road) – Maungatapere, Dargaville (via Murray Road)	SH 12/SH 15 concurrency ends
Kaipara District	Dargaville	142	88	River Road – Te Kōpuru, Pouto
	Dargaville	144.7	89.9	SH 14 - Whangārei
	Brynderwyn	214.3	133.2	SH 1 north – Whangārei SH 1 south – Auckland	SH 12 ends 36°05′49″S 174°25′49″E / 36.096817°S 174.430256°E / -36.096817; 174.430256
Concurrency terminus