St Clair is a leafy residential suburb of Dunedin, New Zealand. It is located on the Pacific Ocean coast five kilometres from the city centre on the southwestern most part of the coastal plain which makes up the southern part of the urban area, and also climbs the slopes of Forbury Hill immediately to the west of this plain. St Clair's 2001 population was 4,179 and in 2013 was 4287.
St Clair Beach is the suburb's most well-known feature. It is the western end of the long beach (Ocean Beach) which stretches along the city's southern shore, and is a popular surfing venue, regularly hosting national and South Island surfing championships. The beach at St Clair is backed by sea wall, behind which is an esplanade consisting of pedestrian walkway and a one-way street. The eastern end of the esplanade leads onto a pathway across the dunes which run along the back of the beach a far as St Kilda.