City One Shatin (Chinese: 沙田第一城) is a residential precinct in the District of Sha Tin, New Territories, Hong Kong. City One is located 12.5 kilometres (7.8 mi) north of Central. The estate occupies approximately 1,800,000 square feet (17 hectares) of land including reclamation. The estate was named City One as it is on Lot 1, Shatin Town. It has a census area population of 24,758 people. City One is the largest private residential estate in Sha Tin District. There are a total of 52 blocks of residential buildings with 10,642 units.