The Royston River, an inland perennial river of the Goulburn Broken catchment, part of the Murray-Darling basin, is located in the lower South Eastern Highlands bioregion and Northern Country/North Central regions of the Australian state of Victoria.

[2] The Royston Power Station, part of the Rubicon Hydroelectric Scheme, a small run-of-the-river hydroelectric scheme, is located at the mouth of the Royston River, where the river is impounded by a 48-metre (157 ft) concrete slab and buttress that diverts water into an aqueduct that carries water for 2 kilometres (1.2 mi) into the neighbouring Rubicon Valley to the Royston Power Station forebay.

Water from the power station outlet discharges into the Rubicon aqueduct about halfway along its length.

[5] The river is not readily accessible nor heavily fished in its lower reaches.

An alternate theory suggests that the river was named in honour of Brigadier John Robinson Royston, a South African who led Australian troops in the Boer War and the First World War.