Berner Au

{{short description|River in Germany}}

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{{Unreferenced|date=September 2020}}

{{Expand German|topic=geo|date=September 2011|Berner Au}}

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{{Infobox river

| name = Berner Au

| image = Rahlsteed - Berner Au Wanderweg.jpg

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| mouth_location = Wandse

| mouth_coordinates = {{coord|53.5923|N|10.1157|E|source:wikidata-and-enwiki-cat-tree_region:DE|display=it}}

| progression = Wandse→ {{RAlster}}

| subdivision_type1 = Country

| subdivision_name1 = Germany

| subdivision_type2 = Location

| subdivision_name2 = Hamburg

| length_km = 8.3

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Berner Au is a small river of Hamburg, Germany. It flows into the Wandse near Tonndorf (a district of Wandsbek).