There are more than 300 Sydney suburbs where it is typical for home loan repayments to top $30,000 a year.

The city's mortgage bill hotspots have been revealed by suburb-level census data provided to Fairfax Media by the Bureau of Statistics.

Dawes Point, adjacent to the southern pylons of the Harbour Bridge, had Sydney's highest median mortgage repayment of $62,400 a year.

Six more harbour-side and northern beaches suburbs had a median annual home loan repayment of more than $50,000. These were Duffys Forest ($60,000 a year), Whale Beach ($57,200), Clontarf ($52,000), Linley Point ($52,000), Longueville ($52,000) and Balgowlah Heights ($51,500).