Choi Hung Estate (Chinese: 彩虹邨; pinyin: Cǎihóng Cūn; Jyutping: coi2 hung4 cyun1; literally: "Rainbow Estate") is one of the oldest public housing estates in Hong Kong. It is located in the Wong Tai Sin District of Kowloon. The estate was built by the former Hong Kong Housing Authority (Chinese: 屋宇建設委員會) and is now managed by the current Hong Kong Housing Authority (香港房屋委員會). It received a Silver Medal at the 1965 Hong Kong Institute of Architects Annual Awards.
Choi Hung Estate is located in Ngau Chi Wan and is surrounded by eastern Kowloon Peninsula's several major roads. To the north is Lung Cheung Road; to the south Prince Edward Road East; to the west Kwun Tong Bypass and to the east Clear Water Bay Road. The geographical location accounts for the excellent transport network near the estate.
The Hong Kong government granted the land to the Hong Kong Housing Authority to build a large housing estate in 1958. The blocks of the estate were completed between 1962 and 1964. An opening ceremony was held in 1963 with the presence of then Hong Kong Governor, Sir Robert Brown Black. A signboard commemorating the ceremony is located in the estate's Lam Chung Avenue.