Lo Wu is an area in North District, New Territories, Hong Kong. It lies on the border between Hong Kong and mainland China, specifically the Luohu District of Shenzhen in mainland China. The area is most notable as the location of the most heavily used immigration control point for passengers travelling to and from mainland China. It is where the Lo Wu station is located.

North District is the northernmost district of the 18 districts of Hong Kong. It is located in the northeastern part of the New Territories. The new town of Fanling–Sheung Shui is within this district. It had a population of 298,657 in 2001. The district has the second lowest population density in Hong Kong.