By 1991, the Perth region had reached a total of over one million people, fulfilling a far sighted estimate made by planning authorities in the 1930s. The region now has a population of some 1.5 million, coinciding with the estimates made in the early 1950s.

While there can be fluctuations from year to year, the long term trend is clear and deep seated, transcending such events as wars and recessions.

The region is still one of the fastest growing metropolitan areas in Australia. Current official predictions envisage an average growth of nearly 2% per annum, resulting in a regional population of 2 million people at the year 2021.