Collarenebri is a town in north western New South Wales, Australia. The town in the Walgett Shire local government area and on the Barwon River approximately 75 kilometres (47 mi) northeast of Walgett and south west of Mungindi on the Gwydir Highway. It is 16 km (9.9 mi) from Pokataroo which was the nearest railway town prior to closure of the rail service there. The town is 150 metres (490 ft) above sea level.
In the 2011 census, Collarenebri had a population of 767.
Collarenebri is an indigenous word of the Gamilaraay galariinbaraay, meaning 'place of flowers' or 'eucalyptus blossoms'.