Population aged between 18 and 25 in Australia - Data and Analysis (1971-2034)

IBISWorld forecasts the population aged between 18 and 25 to rise by 1.5% during 2026-27, to reach 2,997,107 people. While net migration is expected to fall compared to 2025-26 figures, a positive inflow in excess of 200,000 people is still expected. Positive net migration will contribute to an expansion in the population across all ages, including 18 to 25 year olds. In particular, the net inflow of student visa holders is expected to exceed 100,000 in 2026-27, driving up the demographic's population. This inflow from migration will fully offset the imbalance of over 50,000 more people exiting the demographic by turning 26 than the number of individuals turning 18.The long-term growth of the population aged between 18 and 25 has been supported by consistent growth in the number of births. In particular, expansions in birth rates between 2000-01 and 2008-09 has led to growth in the population of this age demographic over the past five years. Migration levels also affect the size of this age demographic. Strong growth in migration levels can have a positive effect on the size of this age demographic, as many migrants are young people entering the country for education or job opportunities. Despite a temporary disruption during the pandemic, net migration has remained an important driver of this population segment over the past five years. In particular, the spike in international students during 2022-23 and 2023-24 contributed to the demographic expanding at the fastest rate on record over the two year period. As growth in international university students has tapered off between 2024-25 and 2026-27, the growth rate of this segment has slowed but remained above historical levels. Overall, IBISWorld forecasts the population aged between 18 and 25 to rise at a compound annual rate of 3.0% over the five years through 2026-27.