Vancouver has been selected as the world's most "liveable city" and Toronto the fifth most liveable in a survey of 132 cities by the Economist magazine.

The Economist Intelligence Unit says Vancouver was chosen number-one due to a low crime rate, little threat from instability or terrorism and a highly developed transport and communications infrastructure.

Vancouver scored a liveability index of 1.3 per cent, with zero per cent indicating exceptional and 100 per cent indicating intolerable.

It's the fifth straight time Vancouver has garnered the honour.

The list published on the Economist.com website shows four Australian cities - Melbourne, Perth, Adelaide and Sydney -- in the top 10, which also included Vienna, Copenhagen, Geneva and Zurich.

The magazine says traffic and crime rates caused such cities as New York, Tokyo, London, Hong Kong and Paris to score lower.

Large centres like London and New York also lost marks by fears of terror attacks.

Algiers was the least liveable city on the list.