Opua is a locality in the Bay of Islands, in the sub-tropical Northland Region of New Zealand. It is notable as the first port for overseas yachts arriving in the country after crossing the Pacific Ocean. In the original 1870s plans for the town, it was named Newport. The town of Paihia is nearby, and the small settlement of Te Haumi is in between.

The car ferry across the Bay of Islands, the main tourist access to Russell, runs between Opua and Okiato.

The New Zealand Ministry for Culture and Heritage gives a translation of "place of the flower" for Ōpua.

The Waimangaro area north-west of Opua is listed on the Ngāpuhi and Te Puni Kōkiri websites as a traditional meeting point of the Ngāpuhi hapū of Te Uri Ongaonga.

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