World’s Most and Least Livable Cities Updated 9:59 AM EDT, Tue August 18, 2015 War-torn Syria's capital, Damascus, is not only the least livable city, it also recorded the biggest livability score decline in the last five years -- a whopping 27-point-decrease. 1. Melbourne, Australia — With great coffee, great food, lively music and arts scene and lots of open space, it's no surprise why Melbourne is rated the most livable city in the annual livability ranking by the Economist Intelligence Unit. 2. Vienna — Scoring 97.4 out of 100, the musical city with glamorous palaces and architecture came second again this year. 3. Vancouver — Once the title-holder of the livability ranking until 2011, Vancouver remains the third most livable city in the world. 4. Toronto — With a stunning skyline featuring the 553-meter-high CN Tower, Toronto came fourth in the survey. 5. Adelaide — Scoring 96.6, Adelaide offers parks, beaches, and vineyards, along with ghost story trails. 6. Calgary — This underrated city in Canada improved its ranking from sixth to fifth this year. 1. Tripoli, Libya — Despite beautiful alleyways, Tripoli fell to become the fifth least livable city in 2015. 2. Lagos — Nigeria's commercial capital suffered from overpopulation, ranking as the fourth least livable city in 2015. 3. Port Moresby, Papua New Guinea — Ranked 138 due to high crime rates and poor infrastructure. 4. Dhaka, Bangladesh — This city's traffic congestion remains a significant factor impacting livability.