Mangamuka River

{{Use New Zealand English|date=April 2024}}

{{Use dmy dates|date=July 2019}}

{{Infobox river

| name = Mangamuka River

| image =

| image_size =

| image_caption =

| source1_location = Maungataniwha Range

| mouth_location = Hokianga Harbour

| subdivision_type1 = Country

| subdivision_name1 = New Zealand

| length_km = 22

| source1_elevation =

| mouth_elevation =

| discharge1_avg =

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}}

The Mangamuka River is a river of the far north of the Northland Region of New Zealand's North Island. It flows generally south from the Maungataniwha Range southeast of Kaitaia, and the last few kilometres of its length are a wide, silty arm of the Hokianga Harbour, which it reaches {{convert|10|km|mi|0}} northeast of Rawene.