Au Tau (凹頭) is an area of Yuen Long District, Hong Kong, located directly east of Yuen Long Town.
Pok Oi Hospital is located in Au Tau.
Pun Uk, a former mansion and a Grade I Historic Building is located in Au Tau, next to the hospital.
Tung Shing Lei (東成里) is a village located in Au Tau.
Castle Peak Road passes through the northern part of Au Tau.
Au Tau Station is proposed as being an intermediate station of the MTR Northern Link.
22°26′23.2″N 114°2′45.67″E / 22.439778°N 114.0460194°E