Ralphs Bay

Ralphs Bay
Ralphs Bay at sunset, 2006
Ralphs Bay Location in Tasmania
Coordinates	42°58′12″S 147°25′48″E / 42.970°S 147.430°E / -42.970; 147.430
Type	Bay
Basin countries	Australia
Settlements	Rokeby, Lauderdale, Sandford, South Arm, Opossum Bay

Ralphs Bay is a body of water in south-east Tasmania, Australia. It is semi-enclosed by the Tranmere / Rokeby peninsula and the South Arm peninsula. Sea access to the bay is from the River Derwent.

Ralphs Bay is a shallow, windy bay, situated on the south-east of the Derwent Estuary, about 12 kilometres from the south-east of Hobart in Tasmania, Australia. The bay is sheltered by the low, grassy hills of Droughty Point to the north-west and the spit of South Arm and Opossum Bay to the south-west.