Sadani Waterfall is situated in Gumla district of Jharkhand in India. It is situated at about 3 km from Rajadera village which is about 26 km south of NETARHAT and 19 km from Chainpur block headquarter. Water falls here from a height of 2600 feet. This waterfall is the origin of SHANKH river. People flock here to see the splendour of the place in large numbers.