Lismore is a city located in the Northern Rivers region of New South Wales, Australia and the main population centre in the City of Lismor…Lismore is a city located in the Northern Rivers region of New South Wales, Australia and the main population centre in the City of Lismore local government area, it is also a regional centre in the Northern Rivers region of the state. Lismore is 734 km north of Sydney and 200 km south of Brisbane. It is situated on a low floodplain on the banks of the Wilsons River near the latter's junction with Leycester Creek, both tributaries of the Richmond River which enters the Pacific Ocean at Ballina, 30 km to the east.