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Portland is a locality on the western side of Whangarei Harbour in Northland, New Zealand. Whangarei is about 10 km to the north. Tikorangi is a hill to the west with a summit 161 m above sea level. The major industry is Portland Cement, which is New Zealand's largest cement manufacturer. It has a specialised loading dock on the harbour, and quarries Tikorangi for lime.