It has been about a week since the first share of data from the 2021 census came out. We’ve already taken a look at what it shows for all of Australia and NSW, but now we can tease out what the data shows in each suburb.

OLDEST AND YOUNGEST SUBURBS

The median age in NSW is 39, which means that half of the state is younger than 39 while the other half is older.

On average, the state skews slightly older than residents of the Northern Territory (33) and ACT (35), but younger than people in South Australia (41) and Tasmania (42).

The youngest suburbs are Shortland-Jesmond and Chippendale, where the median age is 28. In Camperdown-Darlington, the median age is 29. These areas are all also home to many people who have not yet married.

The suburb that skews oldest is Tea Gardens, by the coast near Newcastle, where the median age is 65.

INCOME AND HOUSING COSTS

The suburb with the highest median individual income is Double Bay-Darling Point, where half of the adult population earns at least $1690 a week. Second on the list is North Sydney-Lavender Bay, at $1683 a week.

The suburb with the lowest median individual income is Ashcroft, with $452 a week.

For all of NSW, the median individual weekly income is $813.

The data also shows how much people pay in either mortgage repayments or in rent on average.

The highest median monthly mortgage repayments in NSW are in Hunters Hill, Castle Cove and Vaucluse. In all of these areas the median mortgage repayment is above $4000; all of these are areas with very high property prices. That compares with $2167 for all of NSW.

When it comes to median rent, Belrose tops the list. There, people spend $885 a week on average.

HOME OWNERSHIP

Statewide, 32.6 per cent of private households in NSW are occupied by people who own them outright, 33.7 per cent by people with a mortgage and 33.7 per cent by people who rent.

Keep in mind this is counting households, not people – a rented share house with six people living in it is counted once, as is a unit owned outright by a person living by themselves.

Owner-occupiers make up the highest percentage of households in Tea Gardens (at 62.2 per cent), while the highest percentage of rental properties is in Chippendale (78 per cent).

This is a reflection of the predominant age groups of each suburb – Tea Gardens has the highest median age of any NSW suburb, while Chippendale has the equal-youngest; older people are far more likely to have paid off their home, while younger people are far more likely to be renting.

Often, when we look at census data, the disparities between different suburbs come down to how much they differ in terms of their age distribution.

Schofields-East has the lowest percentage of people who own their home outright. This is because this is a newer area with homes that were built in the past decade or so and which are lived in by young families who have many years left on their mortgages.

RELIGION

One of the key findings in the census was how there had been a considerable drop in the proportion of Christian Australians and a rise in the percentage who ticked ‘‘No Religion’’.

In NSW, among the people who filled out this question on the census, 51.3 per cent are Christian and 35.7 per cent have no religion, but these percentages vary across the state.

In Horsley Park, in Sydney’s west, a little more than 80 per cent of census respondents are Christian, primarily Catholic.

You can find the suburb with the highest percentage of people who put down no religion on the census a little bit closer to the city.

About 70 per cent of census respondents in Newtown are either atheists or agnostics.

As for other major religions: 68.2 per cent of Lakemba’s population is Muslim, 43.7 per cent of Cabramatta is Buddhist, 47.9 per cent of Pendle Hill is Hindu and 43.9 per cent of Dover Heights is Jewish.

HEALTH ISSUES

For the first time, the 2021 census allowed people to specify whether they had any long-term health conditions.

Tea Gardens had the highest percentage of people with arthritis, but it also has a population that is older than the rest of the state.

The most common health issue nationwide was having a mental health condition such as depression or anxiety, but in NSW, mental health was second behind arthritis as the most common health issue. Arthritis affects almost 680,000 people in NSW, or about 9.2 per cent of people in NSW who filled out this question.