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AustraliaPopulation forecast

Northern Territory

Population and age structure

Between 2021 and 2031, the age structure forecasts for Northern Territory indicate a 2.2% increase in females under working age, a 50.4% increase in females of retirement age, and a 7.6% increase in females of working age.

Knowledge of how the age structure of the population is changing is essential for planning age-based facilities and services, such as child care, recreation and aged care.

The forecast age groups of Australia is a function of the current age of the population (people aging each year, being born and dying) as well as the age of people migrating into and out of the area. This in turn is driven by location (fringe, city centre, regional or rural) the existing housing stock (separate dwellings, medium or high density), the amount and type of new residential development (same as existing stock, or diversifying) and where the area is in a cycle of change. We call this the area’s residential role and function.

Forecast age structure - 5 year age groups
Northern Territory - Total females202120312041Change between 2021 and 2041
Age group (years)Number%Number%Number%Number
0 to 48,4566.98,8056.58,8206.1+364
5 to 98,8637.29,0506.78,7886.1-75
10 to 148,2086.78,2436.18,7106.0+502
15 to 197,3046.08,2536.18,5005.9+1,196
20 to 248,0836.68,9656.79,0846.3+1,001
25 to 2911,5369.410,9838.211,8508.2+314
30 to 3412,0089.810,8258.011,5768.0-432
35 to 3910,4628.611,8788.810,7387.4+276
40 to 448,7667.211,1408.39,9776.9+1,211
45 to 497,8616.49,8117.311,1987.8+3,337
50 to 547,8116.47,8745.810,2847.1+2,473
55 to 596,7445.56,7865.08,6436.0+1,899
60 to 645,7934.76,4194.86,4614.5+668
65 to 694,2073.44,9513.75,0813.5+874
70 to 742,9792.44,2243.14,8303.3+1,851
75 to 791,5941.33,0282.23,7602.6+2,166
80 to 849920.82,0891.53,1162.2+2,124
85 and over6820.61,4271.13,0132.1+2,331
Total persons122,349100.0134,750100.0144,427100.0+22,078
Source: .id SAFi National to State tops-down forecast, 5.1.0, published May 2023. Prepared by .id (informed decisions)

Key findings

In 2021, the dominant age structure for females in Northern Territory was ages 30 to 34, which accounted for 9.8% of the total females.

The largest increase in females between 2021 and 2031 is forecast to be in ages 40 to 44, which is expected to increase by 2,374 and account for 8.3% of the total females.

The largest female 5 year age group in 2031 is 35 to 39 years, with a total of 11,878 females.

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