Rotach

{{short description|River in Germany}}

{{Unreferenced|date=September 2020}}

{{Infobox river

| name = Rotach

| image = Friedrichshafen-Rotach08.jpg

| image_size =

| image_alt = The Rotach at Friedrichshafen

| image_caption = The Rotach at Friedrichshafen

| map =

| map_size =

| map_alt =

| map_caption =

| source1_location =

| mouth_location = Lake Constance

| mouth_coordinates = {{coord|47|38|59|N|9|29|43|E|name=Rotach mouth|display=inline,title}}

| subdivision_type1 = Country

| subdivision_name1 = Germany

| subdivision_type2 = State

| subdivision_name2 = Baden-Württemberg

| progression = {{RRhine}}

| length = {{convert|39.4|km|abbr=on}} {{GeoQuelle|DE-BW|LUBW}}

| source1_elevation = {{convert|620|m|abbr=on}}

| mouth_elevation = {{convert|395|m|abbr=on}}

| discharge1_avg =

| basin_size = {{convert|136|km2|abbr=on}} {{GeoQuelle|DE-BW|LUBW}}

| tributaries_left =

| tributaries_right =

}}

The Rotach is a {{convert|39|km|mi|adj=mid|-long}} tributary of Lake Constance, which drains to the Rhine, in the German state of Baden-Württemberg. The river source is near the municipality of Wilhelmsdorf. It flows southward through Horgenzell and Oberteuringen before emptying into Lake Constance at the city of Friedrichshafen.