 At the 2001 census , the population of the Murray @-@ Murrumbidgee ( Statistical Region Sector ) , consisting almost entirely of the Riverina , was 255 @,@ 881 , 2 @.@ 9 % of whom were indigenous and 7 @.@ 4 % born outside Australia . Other than the United Kingdom and Ireland , the largest ethnic groups in the Riverina were Italians and Germans . 
