乌德纳达塔（英文：Oodnadatta）为澳大利亚南澳大利亚州北部城镇，濒临尼尔斯河，曾经为澳大利亚中部的主要供应中心，随着澳大利亚中央铁路西延后衰落，现时为运牛列车编组站。

Oodnadatta, in the Australian state of South Australia, is a small town surrounded by an area of 7,800 square kilometres (3,000 sq mi) with cattle stations in arid pastoral rangelands close to the Simpson Desert, 1,011 km (628 mi) north of Adelaide and 112 m above sea level. It can be reached by an unsealed road from Coober Pedy or via the unsealed Oodnadatta Track from Marree to Marla or from the north via Finke, Northern Territory ("Old Ghan Heritage Trail"). The name is derived from Arrernte utnadata, meaning "mulga blossom".