Kwu Tung (Chinese: 古洞) is an area in the northern New Territories, west of Sheung Shui and Fanling, and east of Lok Ma Chau and San Tin, in Hong Kong.

For electoral purposes, Kwu Tung is part of the Sheung Shui Rural constituency of the North District Council.

With the sediment of Sheung Yue River and creeks nearby, the land of Kwu Tung is relatively plain compared to the rest of hilly Hong Kong.

The planned new town includes residential, commercial and community developments, a public transport interchange and a railway station along the existing Lok Ma Chau Spur Line component of the East Rail Line.

Construction of the future Kwu Tung Station is scheduled to commence in 2023 with forecast completion in 2027, and is expected to be followed by subsequent expansion to accommodate the planned Northern Link railway connection to Kam Sheung Road Station.