Warnes River, a perennial stream of the Macleay River catchment, is located in the Northern Tablelands district of New South Wales, Australia.

Warnes River rises below Mount Werrikimbe, on the eastern slopes of the Great Dividing Range south of Red Hill, and flows generally west northwest then north within Oxley Wild Rivers National Park before reaching its confluence with the Yarrowitch River, northeast of Yarrowitch; descending 577 metres (1,893 ft) over its 23 kilometres (14 mi) course.

• List of rivers of Australia
• Rivers of New South Wales

• "Macleay River catchment" (map). Office of Environment and Heritage. Government of New South Wales.

31°14′S 152°05′E / 31.233°S 152.083°E / -31.233; 152.083