Umlach
{{short description|River in Germany}}
{{Expand German|topic=geo|date=September 2011|Umlach }}
{{Infobox river
| name = Umlach
| image =
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| source1_location =
| mouth_location = Riß
| mouth_coordinates = {{coord|48.0783|9.8150|display=it}}
| progression = {{RRiß}}
| subdivision_type1 = Country
| subdivision_name1 = Germany
| subdivision_type2 = State
| subdivision_name2 = Baden-Württemberg
| length = {{convert|23.1|km|abbr=on}} {{GeoQuelle|DE-BW|LUBW}}
| source1_elevation =
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Umlach is a river of Baden-Württemberg, Germany. It flows into the Riß near Biberach an der Riss.