Abuna River

{{Short description|River in the Amazon region}}

{{Infobox river

| name = Abuna River

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| image = Bolivia north.jpg

| image_size = 300

| image_caption = On the right is the Abuna River, on the left is the Madeira River

| map = Rio Negro map.jpg

| map_size = 300

| map_caption =

| pushpin_map = Bolivia

| pushpin_map_size = 300

| pushpin_map_caption= Mouth in Bolivia

| subdivision_type1 = Country

| subdivision_name1 = Bolivia, Brazil

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| subdivision_type3 = Region

| subdivision_name3 = Pando Department

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| length = {{convert|500|km|mi|abbr=on}}{{cite book |last1=Ziesler |first1=R. |last2=Ardizzone |first2=G.D. |title=The Inland waters of Latin America |year=1979 |url=http://www.fao.org/docrep/008/ad770b/AD770B06.htm |publisher=Food and Agriculture Organization of the United Nations |isbn=92-5-000780-9 |chapter=Amazon River System |archiveurl=https://web.archive.org/web/20131021061745/http://www.fao.org/docrep/008/ad770b/AD770B06.htm |archivedate=21 October 2013 |url-status=live}}

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| mouth = Madeira River

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| mouth_coordinates = {{coord|9|40|18|S|65|26|47|W|display=inline,title}}

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The Abuna River ({{langx|es|Río Abuná}}, {{langx|pt|Rio Abunã}}) is a river in South America. As a part of the Amazon Basin, it forms part of the border between northern Bolivia and north-western Brazil.

The river has a total length of {{convert|375|km}}. It originates in several streams east of the Cordillera Oriental of the Peruvian Andes. The river is navigable for circa {{convert|320|km}} in its lower northeastern part. At Manoa it joins the Río Madeira, a tributary of the Amazon. Opposite the river mouth is the town of Abunã on the Brazilian side of the confluence.