The Bible refers to Christians as "saints" in a whole bunch of places. For example:
Paul, called by the will of God to be an apostle of Christ Jesus, and our brother Sosthenes, To the church of God that is in Corinth, to those sanctified in Christ Jesus, called to be saints together with all those who in every place call upon the name of our Lord Jesus Christ, both their Lord and ours: Grace to you and peace from God our Father and the Lord Jesus Christ. (1Co 1:1-3)
Now it turns out that there haven't been any Christians in Australia until now:
Australian Woman to Become Country's First Saint
Pope Benedict XVI has approved the second miracle needed for an Australian woman to be declared the country's first saint.
Benedict approved a decree saying that a miracle occurred thanks to the intercession of Mother Mary Mackillop, who helped spread Roman Catholicism across the Australian outback in the late 1800s and is known for her pioneering work among the needy.
Mackillop died in 1909 and was beatified by Pope John Paul II in 1995.
That is kind of surprising. I would have assumed there were lots of Christians in Australia. To find that the first one was discovered this year and is a woman who has been dead for 100 years was a shock. Anyways, congrats to Australia for its first Christian!