It is the first time it has topped the EIU survey, which began in its current form in 2004.
The ranking, which was done by the Economist Intelligence Unit (EIU) considered factors such as healthcare, education, infrastructure, among others.
Vienna scored a "near-ideal" 99.1, beating Melbourne into second place on 98.4.
Japan's Osaka and Tokyo have now moved up into the top ten, coming in third and seventh place respectively. Calgary in Canada came in fourth, with Australia's Sydney in fifth place.
Typically, mid-sized cities tend to do well on the rankings, while large global metropolises tend to be punished for their successes by having higher costs of living and weaker public infrastructure due to higher demand on them.
Several of the cities that featured in the top 10 also have a relatively low population density, resulting in lower crime rates and a less overburdened infrastructure. Vancouver, Canada, 7. Tokyo, Japan, 8.
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She was the highest-ranking African-American on the White House staff. "Now that she says bad about me, they will talk to her. Manigault-Newman also taped Trump sounding surprised on the phone after being informed of her firing at Kelly's behest.
According to the newly-published Global Liveability Index, Copenhagen is one of the most liveable cities in the world.
Researchers said wealthy financial capitals such as Paris (19th), London (48th) and NY (57th) tended to be "victims of their own success" with higher crime rates and overstretched infrastructure dampening their appeal.
The 10 cities lowest in the ranking were Damascus, Syria; Dhaka, Bangladesh; Lagos, Nigeria; Karachi, Pakistan; Port Moresby, Papua New Guinea; Harare, Zimbabwe; Tripoli, Libya; Douala, Cameroon; Algiers, Algeria; and Dakar, Senegal.
Unfortunately, no United Kingdom city made it into the top ten.
In total, 68 cities have seen their liveability ranking improve over the past year, while it has declined in nine cities.
Hong Kong - whose ranking on Economist Intelligence Unit's (EIU) Global Liveability Index fell dramatically in 2015 due to heightened fears of unrest as part of the so-called Umbrella Revolution - was overtaken by Singapore in the rankings for the first time previous year.