The Radbuza (; ) is a river in the Czech Republic, the secondary source river of the Berounka River. It flows through the Plzeà  Region. It is long, making it the 17th longest river in the Czech Republic.
The name is derived from the personal Slavic name Radbud. The land through which the river flows once belonged to someone of that name.
The Radbuza originates in the territory of RybnÃÂk in the Upper Palatine Forest at an elevation of and flows to Plzeà Â, where it joins the Mà ¾e at an elevation of and together they form the Berounka. It is long, making it the 17th longest river in the Czech Republic. Its drainage basin has an area of , of which is in Germany.
The longest tributaries of the Radbuza are:
The river flows through the municipal territories of RybnÃÂk, BÃÂlá nad Radbuzou, Hostouà Â, Srby, Horà ¡ovský Týn, Kà Âenovy, Staà Âkov, HolÃ½à ¡ov, Hradec, Stod, ChotÃÂà ¡ov, Vstià ¡ and Dobà Âany before joining the Mà ¾e in Plzeà Â.
There are 154 bodies of water larger than 1 ha in the basin area. The largest of them and the only body of water built on the Radbuza is the ÃÂeské údolàReservoir with an area of .
The river is home to a population of Eurasian beaver as well as nutria, which is a non-native species.
The Radbuza is suitable for river tourism. It belongs to the undemanding rivers suitable for beginner paddlers and is navigable for most of the year.