The analysis is contained in a series of updated fact sheets comprising statistics on family types, fertility rates, marriages, household size, cohabitation rates, divorces, and parent contact with children after separation.

Australian Institute of Family Studies Director, Anne Hollonds said the aging of the population was one key factor behind a trend that would see childless families outnumber those with children for the first time in 2030.

"ABS projections suggest that families will look very different in the next 15 years with more couple families living in smaller households without children than currently do now," Ms Hollonds said.

Key statistics include: