sentences:  Oonoonba was once considered isolated from Townsville, but subdivision development at neighbouring Idalia has filled the void between and has made Oonoonba become part of the contiguous urban area of Townsville.The areas in the north and east of the suburb along the river are not used as they are marshland.The North Coast railway line passes through the suburb from south (Idalia/Cluden) to north, crossing the Ross River to Railway Estate ().