South Horizons (Chinese: 海怡半島) is a private housing estate located at the western end of Ap Lei Chau (a.k.a. Aberdeen Island), in the Southern District of Hong Kong. Developed by Secan Limited, a Hutchison Whampoa associate company, it consists of 34 blocks, ranging in height from 25 to 42 storeys, completed between 1991 and 1995. Census data indicate that South Horizons had a population of 31,496 in 2011 and was the most populated among the private and public estates of the district.
South Horizons was built in four phases, with Phase I and Phase IV closer to Ap Lei Chau Estate, a public housing estate. The property is currently owned and managed by Hutchison Whampoa Limited. The estate has a total of 9,812 residential units. It has been described as a "middle-class estate", with a median monthly domestic household income of HK$ 54,300 in 2011.
South Horizons covers two of the 17 constituencies of Southern District Council, South Horizons East and South Horizons West. Each of these two constituencies returns one district councillor to the Southern District Council, with an election every four years.
South Horizons has been marketed as Hutchison Whampoa's second "Garden City" project, the first one being Whampoa Garden, completed in Hung Hom in 1991. More than 50 plant species are cultivated there, and a nature trail along the shore features information boards on tree species. In 2004, Phases II to IV received a Silver Award for Landscape Design as part of the Best Landscape Award for Private Property Development.