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Gronau
Gronau near Neuengronau
Location
Country	Germany
State	Hesse
Physical characteristics
Source
• location	Gutsbezirk Spessart
Mouth
• location	Altengronau
• coordinates	50°14′42″N 9°36′54″E / 50.2450°N 9.6150°E / 50.2450; 9.6150
Length	9.7 km (6.0 mi)[1]
Basin size	26.4 km2 (10.2 sq mi)[1]
Basin features
Progression	Sinn→ Franconian Saale→ Main→ Rhine→ North Sea

Gronau (German pronunciation: [ˈɡʁoːnaʊ] ^ⓘ) is a river of Hesse, Germany and a right tributary of the Sinn. Including its left source river Westernbach, it has a total length of 9.7 kilometres (6.0 mi).^[1]

The Gronau rises in the unincorporated area Gutsbezirk Spessart in the Hessian part of the Mittelgebirge Spessart. It flows into the Sinn at Altengronau.

• List of rivers of Hesse

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