Williamson River (New Zealand)

{{Infobox river

| name = Williamson River

| native_name =

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| map = {{Maplink|frame=yes|type=line|plain=yes|zoom=10|frame-align=center|frame-width=270|frame-height=270|stroke-color=#0000ff|stroke-width=2}}

| map_size =

| map_caption = Route of the Williamson River

| map_alt =

| pushpin_map = New Zealand#New Zealand South Island

| pushpin_map_size = 270px

| pushpin_map_caption= Mouth of the Williamson River

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| subdivision_type1 = Country

| subdivision_name1 = New Zealand

| subdivision_type2 = region

| subdivision_name2 = West Coast Region

| subdivision_type3 = District

| subdivision_name3 = Westland District

| length = {{convert|7.56|km|mi}}

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| source1 = Lake Williamson

| source1_location = {{cvt|655|m}}

| source1_coordinates= {{coord|-44.4054|168.4069|type:river_region:NZ|display=inline}}

| source1_elevation =

| mouth = Arawhata River

| mouth_location =

| mouth_coordinates = {{coord|-44.3863|168.4791|region:NZ|format=dms|display=inline,title}}

| mouth_elevation =

| progression = Williamson River → Arawhata River → Jackson Bay / Okahu → Tasman Sea

| river_system = Arawhata River basin

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| tributaries_left = Pass Creek, Tornado Creek, Topsey Creek

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The Williamson River is a minor river in the South Island of New Zealand.

It lies within the borders of the Mount Aspiring National Park and feeds into the Arawhata River.

Category:Rivers of the West Coast Region

Category:Rivers of Mount Aspiring National Park

Category:Westland District