Only 12 per cent said they were likely to switch their main bank in the next six months.
The findings are included in the Urban Market Research report from Lifelounge Group and Sweeney Research.
Lifelounge Group chief executive Dion Appel said he expected the banks to spend considerable marketing dollars to court the youth market in the period ahead in a similar way to what had occurred in the telecommunications industry.
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"Unravelling and transferring all your direct debits has been too difficult and easy to defer," Mr Appel said in a statement.
"Expect an onslaught of marketing activity from the banks to achieve 'main bank' status with younger customers."
Mr Appel said the youth market was worth an estimated $62 billion, or 13 per cent of Australian total household expenditure, and was an often underestimated part of the economy.
The survey comprised responses from 1000 Australians aged between 16 and 30 years old.
