Ohm
Ohm source east of Ulrichstein
Location
Country	Germany
State	Hesse
Physical characteristics
Source
• location	Near the town Ulrichstein in the High Vogelsberg region.
• elevation	577 m (1,893 ft)
Mouth
• location	Lahn, short before the town Cölbe
• coordinates	50°51′15″N 8°47′41″E / 50.85417°N 8.79472°E / 50.85417; 8.79472
• elevation	188 m (617 ft)
Length	60.7 km (37.7 mi) [1]
Basin size	983.2 km2 (379.6 sq mi) [1]
Discharge
• average	62.6 m3/s (2,210 cu ft/s)
Basin features
Progression	Lahn→ Rhine→ North Sea

The Ohm (older Amana^[2]) is a river in Hesse, Germany.

It is a right tributary of the Lahn. Its total length is 61 km (38 mi).^[1] The Ohm originates in the Vogelsberg Mountains, east of the town Ulrichstein. It flows generally northwest through Ulrichstein, Mücke, Homberg, Amöneburg, Kirchhain, and joins the Lahn in Cölbe, near Marburg. Its largest tributaries are the Seenbach, Felda, Klein, Wohra and Rotes Wasser.