The Calvert River is a 222 km long river in the Northern Territory of Australia.
The headwaters rise on a plain between the Calvert Hills and China Wall and flow northward through mostly uninhabited lands and pastoral leases such as Calvert Hills Station before finally discharging into the Gulf of Carpentaria 150 kilometres east of Borroloola, not far from the border with Queensland in the Gulf Coastal bioregion. It has a mean annual outflow of 1,000 gigalitres, Before reaching the sea it flows through the Australian Wildlife Conservancys Pungalina-Seven Emu Sanctuary.
Fourteen tributaries feed the river including; Bloodwood Creek, Tobacco Creek, Goanna Creek, Pungalina Creek and the Little Calvert River.
The rivers catchment area is 10,033 square kilometres.
