Younghusband Peninsula' is a long narrow peninsula in South Australia, at 36°00′S 139°30′E / 36°S 139.5°E / -36; 139.5. It separates Encounter Bay which is part of the Southern Ocean from the Coorong which is part of the estuary of the River Murray. It lies entirely within the Coorong National Park. The peninsula is over 110 kilometres long, but less than 3 kilometres wide at its widest point. Its narrowest point is less than 350 metres wide. The Younghusband Peninsula, together with the Sir Richard Peninsula on the western side of the Murray Mouth, are the Primary Sand Dune line defining this stretch of coastline, and the flooded swale behind this primary dune line forms the Coorong.
Younghusband Peninsula was named after William Younghusband, M.P.