Following are the largest banks in Australia ranked by total assets in Australian dollars. National Australia Bank is the largest Australian bank with assets of over A$750 billion (approximately US$728.24 billion) at September 30, 2011.

Rank Company 2011
Assets, A$b
2010
Assets, A$b
2009
Assets, A$b
2008
Assets, A$b
2007
Assets, A$b
Balance Sheet
1 National Australia Bank (NAB) 753.757 685.952 654.120 656.799 574.220 Sept 30
2 Westpac Banking Corporation 670.228 618.277 589.587 439.676 377.620 Sept 30
3 Commonwealth Bank of Australia 667.899 646.330 620.372 487.572 440.157 Sept 30
4 Australia and New Zealand Banking Group 594.488 531.703 476.987 470.293 392.773 Sept 30
5 Macquarie Group 157.568 145.940 149.144 167.250 136.389 March 31
6 Suncorp Group 95.488 95.339 97.463 94.722 84.901 June 30
7 Bankwest (Bank of Western Australia)1 76.828 74.684 68.327 n/a n/a June 30
8 Bendigo and Adelaide Bank2 55.005 52.141 47.114 48.049 n/a June 30
9 ING Bank (Australia) 47.406 48.353 47.397 47.853 42.103 Dec 31
10 Bank of Queensland 39.901 38.598 34.012 29.883 20.037 Aug 31

1 - Bankwest is a subsidiary of Commonwealth Bank since 2008.
2 - Bendigo Bank merged with Adelaide Bank in 2007.