He subsequently named the river Richmond after the fifth Duke of Richmond. Rous entered the river and sailed about 20 miles (32 km) up river. The first European to discover the mouth of the Richmond River was Captain Henry John Rous who in 1828 identified the mouth of the river as he sailed along the coast from Sydney Town to Moreton Bay. The inland peoples from around Casino brought black bean seeds with them to trade for the fish. One of the annual rituals of the Bundjalung people was the movement to the coast during the winter months when the mullet were plentiful. The Bundjalung spread across the area and their territory reached as far north as Toowoomba and included the modern-day towns of Tenterfield and Warwick. It is unclear how many of the group lived around Casino although one report, dating from 1840, talks about a gathering of a 'mob of wild blacks numbering five hundred or upwards'. Prior to European settlement the Casino district was part of the lands inhabited by the Bundjalung Aborigines. It is also a major service centre for the rich pasture lands which surround it.
It has a large number of interesting historic buildings. Casino Pleasant country town on the banks of the Richmond River Located 726 km north of Sydney and 228 km south of Brisbane, Casino is a pleasant country town on the Richmond River.