A smaller proportion of Queensland's population lives in the capital city than any other mainland state. As of June 2004 the capital city represented 45.7% of the population; for the whole country, capital cities represented 63.8% of the total population.

• Kristian: 70.9%:
  • Katolik Rom: 24.9%
  • Anglican: 22.3%
  • Uniting Church: 8.4%
  • Lutheran: 2.1%
  • Lain: 13.2%
• Bukan-Kristian: 2.3%
  • Agama Buddha: 1.1%
  • Islam: 0.4%
  • Agama Hindu: 0.3%
  • Agama Yahudi: 0.1%
  • Lain: 0.4%
• Tiada agama: 14.8%
• Tidak dinyatakan: 12.0%

Pada 9 Disember 2005, the population of Queensland officially reached 4 million. Queensland is the fastest growing state in Australia, with over 1,500 people moving to the state per week; 1,000 in the southern part of the state alone. Predictions show that Queensland will become Australia's second most populous state by the late 2020s. [12] According to Queensland's Office of Economic and Statistical Research the estimated population of the state at the end of 2007 was 4,228,290 which is almost 20% of Australia's total.

In 2007, Queensland recorded a TFR of 2.1, the highest since 1977.[13]