The Chamb (German: Chamb; Czech: Kouba) is a river in the Czech Republic and in Germany. It is a 50-kilometre (31 mi) right tributary of the Regen.

Chamb Kouba
River Chamb near Arnschwang
Location
Countries	Germany Czech Republic
Physical characteristics
Source
• location	South of Kdyně, Domažlice, Plzeň Region
Mouth
• location	Regen at Cham, Oberpfalz Bavaria
• coordinates	49°13′17″N 12°41′8″E / 49.22139°N 12.68556°E / 49.22139; 12.68556
• elevation	370 m (1,210 ft)
Length	50.3 km (31.3 mi) [1]
Basin size	418 km2 (161 sq mi) [1]
Discharge
• average	variable
Basin features
Progression	Regen→ Danube→ Black Sea

The Chamb begins south of the Czech village of Kdyně, and for some 6 kilometres (3.7 mi) flows westward, crossing into Germany at an elevation of 407 metres (1,335 ft). From there it flows southwestward through Eschlkam, Furth im Wald, and Arnschwang, joining the Regen east of the city of Cham (whose name is of similar Celtic etymology).

The discharge of the Chamb is variable. The highest and lowest recorded flow rates are 60.8 m³ (2,150 cu ft) per second (July 9, 1954) and 0.36 m³ (13 cu ft) per second (June 9, 1960).