Tsing Yi (Chinese: 青衣), or Tsing Yi Island (Chinese: 青衣島) is an island in the urban area of Hong Kong, to the northwest of Hong Kong Island and south of Tsuen Wan. With an area of 10.69 km², the island has extended drastically by reclamation along almost all its natural shore and the annexation of Nga Ying Chau and Chau Tsai. Three major bays or harbours, Tsing Yi Lagoon, Mun Tsai Tong and Tsing Yi Bay in the northeast, have been completely reclaimed for new towns.

The Island can be divided as four quarters, the northeast quarter is a residential area, the southeast quarter is Tsing Yi Town, the southwest holds heavy industry, and the northwest includes a recreation trail, a transportation interchange and some dockyards and ship building industry. The island is at the northwest part of Victoria Harbour and part of its development is under the Law of Hong Kong, Chapter 531, the Protection of the Harbour Ordinance.

In the early days, the inhabitants on the island were mostly farmers and fishermen. The major population concentrated in the northeast portion of the island. Farmers grew rice, vegetables and pineapples, while fishermen lived in huts connected by plank walkways in the small harbour of Tsing Yi Tong which stretched far back into the island. Many fishermen also lived on their junks and boats all the time, fishing in the nearby waters. Even as late as the 1970s, Tsing Yi Tong resembled Tai O with its characteristic stilt houses and water vehicles. Like many other fishing villages in Hong Kong, the Tsing Yi dwellers worshipped Tin Hau, the goddess of mercy and the sea. A Tin Hau Temple was built on the shore of Tsing Yi Tong. At the birthday of Tin Hau, fishermen of all nearby waters would come to the Temple for celebrations. The temple was white in color and thus people call it Pak Miu (白廟, lit. White Temple).

From the 1920s onwards, a Chinese company built lime factories on the present site of Greenfield Garden. It is the earliest known industry on the island. The lime industry continued to flourish during the 1950s, and a tanning factory was also founded at the same period. After World War II, other heavy industries moved in as well. In the 1960s, several oil companies moved their oil storage depots onto the island, likewise a China Light and Power power station, and a Green Island Cement cement plant. Meanwhile, some small shipbuilding companies started their business in Tsing Yi, and remain on the north side of the Island. In the 1970s, six large-scale companies on the island collectively built the Tsing Yi Bridge to connect Tsing Yi Town and Kwai Chung Town over the Rambler Channel. The bridge was soon transferred to the Hong Kong Government, remaining the sole road connection to the island for more than ten years. Several industrial buildings for light industries were constructed beside the bridge afterward. Several dockyards moved to the west shore of the island at the end of the 1970s.

It is noteworthy that Wok Tai Wan on the Tsing Yi Island was once a paradise for nudists during the 1950s, and hence Tsing Yi was once synonymous with nudism in Hong Kong.

After the establishment of the Tsing Yi Bridge, the Hong Kong Government commenced an extensive new town project on the island. Cheung Ching Estate, Cheung Hong Estate and Mayfair Gardens were consequently built in heaps. The vicinity of the Mobil oil storage depot to Mayfair Garden and Cheung Ching Estate once aroused enormous concern for the safety of the residents. Some social workers and residents urged the government to relocate the storage facilities. The government decided to halt the last phase of the Mayfair Garden development scheme. The storage facility remained at the same location until Container Terminal 9 was on the Government's agenda.

Later on, the tenor of town development shifted northward. Two fisherman harbours, Tsing Yi Tong and Mun Tsai Tong were reclaimed for residential use. Many fishermen were relocated from their boats parked in the typhoon shelter to the Ching Tao House, a new residential block on land, of Chueng Ching Estate. The land inhabitants were put together into several designated areas so as to re-build their villages. The primary sectors had all died out owing to the drastic town development. Tsing Yi Estate, Cheung On Estate, Cheung Fat Estate, Ching Tai Court and Tsing Yi Garden were built after all reclamations were accomplished. Ching Wah Court was built adjoining to Cheung Hong Estate.

At the same time, Tsing Yi Bridge was seriously overburdened and its structure was unable to cope with ever-increasing traffic. There was only a one-way road in each direction on the bridge. Traffic congestion became the burning problem in the community, and subsequently aroused protest. Finally, Tsing Yi North Bridge, a connection to Tsuen Wan Town was built to ease off the congestion, as well as to accommodate the local residential population boom.

Tsing Yi was continually under further development and Greenfield Garden, Serene Garden, Broadview Garden, and Cheung Hang Estate were constructed.

The final decision to relocate Hong Kong International Airport spurred a new series of development: Airport Railway, Ting Kau Bridge to Ting Kau and North New Territories, Tsing Ma Bridge to Ma Wan and Lantau Island, Rambler Channel Bridge to Kowloon and Hong Kong Island, Duplicate Tsing Yi South Bridge on the south side of Tsing Yi Bridge.

On the island, new residential projects, Tivoli Garden, Grand Horizon, Mount Haven, Villa Esplanada, Tierra Verde, and Cheung Wang Estate were completed. The final part of reclaimed land near the shore had been laid waste for almost a decade until Tsing Yi Promenade was built in 2004. Local Hong Kong cultural pursuits of Chinese music and dancing, walking and Chinese exercise are in evidence in most evenings.

During 2000 to 2004 Container Terminal 9 was built on the reclaimed southwest shore of the island, together with resident blocks, Rambler Crest. Nearby, and well within sight of Central. Victoria, a controversial new dioxin burning plant was also put into operation during 2004, arousing much concern for the residents of Tsing Yi and Hong Kong island.

Tsing Yi Island is a hilly island with Tsing Yi Peak in the south and Liu To Shan in the north east. Small plain can be found surrounding the former Tsing Yi Lagoon in island northeast. The rocks on the island are mainly granite and were exposed due to extensive housing, industrial and infrastructure construction. Although the island is not fallen in the administration of country park, most of the hilly area remains green. The Tsing Yi Peak climbs to 334 metres and is a barrier separating industrial west and residential east.