Melbourne's outer west is booming like never before - with the population increasing by a city the size of Hobart in the last decade alone.

And the latest population figures for the nation, released on Tuesday, show that a suburb in the city's outer north - South Morang - is now the fastest growing in the country.

Melbourne grew by almost 100,000 people in the last year alone. Credit:Eddie Jim

In the year to last June, 80 people a week moved to South Morang - perhaps one of the reasons the car park at the railway station there is full by 6.30am each morning.

Teacher Darren Peters moved overseas a month ago, but lived in Doreen and worked in Mill Park for years. He travelled through South Morang every day and saw the effects of the massive population growth in the area.