The Yuin nation, also spelt Djuwin, is a group of Australian Aboriginal peoples from the South Coast of New South Wales. All Yuin people share ancestors who spoke, as their first language, one or more of the Yuin language dialects. Sub-groupings of the Yuin people are made on the basis of language and other cultural features; groups include the Brinja or Bugelli-manji, Wandandian, Jerrinja, Budawang, Yuin-Monaro, Djiringanj, Walbunja, and more. They have a close linguistic and cultural association with the Thaua and Dharawal people.

The ethnonym Yuin ("man") was selected by early Australian ethnographer, Alfred Howitt, to denote two distinct Nations of New South Wales, namely the Djiringanj and the Thaua. In Howitt's work, the Yuin were divided into northern (Kurial-Yuin) and southern (Gyangal-Yuin) branches.

The term "Yuin" is commonly used by South Coast Aboriginal people to describe themselves, although in a 2016 New South Wales native title application for land overlapping Yuin country, "South Coast people" is used. The name is also spelt Djuwin and Juwin.

The native title application depends on establishing the South Coast Aboriginal people as a distinct and continuing group that has existed since colonisation. South Coast Aboriginal people have identified 59 apical ancestors that lived during the settlement of the region in 1810–1830; current South Coast Aboriginal people are either descended from these ancestors or integrated into families that descend from these ancestors.

In 2018, the National Native Title Tribunal ruled that the South Coast people represent a "single cohesive kinship population" going back to colonisation, governed by shared rules, with a "single system of religion" centred on the figure Darhumulan, a marine-based economy, sacred sites that continue to be recognised, exogamous marriage rules, and a male initiation ceremony called Bunan (remembered, but not practised since the 1920s).

Dialects of the Yuin language group include the Djiringanj, Thaua, Walbanga, Wandandian and Dhurga languages, from north of Moruya River to Nowra.

The country the Yuin ancestors occupied, used, and enjoyed reached across from Cape Howe to the Shoalhaven River and inland to the Great Dividing Range. Their descendants claim rights to be recognised as the traditional owners of the land and water from Merimbula to the southern head of the sea entrance of the Shoalhaven River. The Yuin people consisted of 12 clans at the time of European arrival in the area.

The Yuin groups include: