Melbourne's skyline (REUTERS/Mick Tsikas)

Melbourne, Australia now has the title of world's most livable city, according to the Economist Intelligence Unit's 2011 Global Liveability Survey

Following behind Melbourne is Vienna, Austria and Vancouver, Canada. Vancouver was previously considered the world's most livable city, however factors such as traffic congestion led to the drop.

The Global Livability Survey scored 140 cities based on five categories including education, health care, and infrastructure.The Economist reported that those that score best tend to be mid-sized cities in wealthier countries with a relatively low population density.

New York City ranked 56, due to perceived threat of terror and the rates of petty and violent crime according to the Economist Gulliver.

On the opposite side Harare, Zimbabwe is found to the be the most unlivable, with Dhaka, Bangladesh and Port Moresby, Papua New Guinea following closely behind.

The top ten ratings are as followed:

1. Melbourne

2. Vienna

3. Vancouver

4. Toronto

5. Calgary

6. Sydney

7. Helsinki 

8. Perth

 9. Adelaide

10. Auckland