Herald Sun | Australian population hits 25 million amid high immigration and solid birthrates Herald Sun AUSTRALIA'S population will hit the 25 million mark on Tuesday night — 33 years earlier than was predicted just two decades ago. Mass migration and higher than anticipated birthrates have caused the population to increase by a third in the past 20 years. Australian No. 25 million not the archetypal hospital baby Growing pains as Australia prepares to welcome 25 millionth resident Water scarcity: the inconvenient truth immigration boosters ignore |