It's the first time three cities have shared the top spot in the 30-year history of the annual Economist Intelligence Unit survey, which compares prices in 133 cities globally.
The French capital - ranked second most expensive last year - is one of four European cities in the top 10.
The survey compares the cost of common items, such as bread, in 133 cities.
It then tracks whether prices have gone up or down by comparing them to the cost of living in New York, which is used as a benchmark.
Report author Roxana Slavcheva said Paris had been among the top 10 most expensive cities since 2003 and was "extremely expensive" to live in.
"Only alcohol, transport and tobacco offer value for money compared with other European cities," she said.
The average cost of a woman's haircut, for example, costs $119.04 (£90) in Paris, compared with $73.97 in Zurich and $53.46 in Japanese city Osaka.
"European cities tend to have the highest costs in the household, personal care, recreation and entertainment categories - with Paris being a good representative in these categories - perhaps reflecting a greater premium on discretionary spending," Ms Slavcheva said.
The most expensive cities in the world
1. Singapore (Singapore)
1. Paris (France)
1. Hong Kong (China)
4. Zurich (Switzerland)
5. Geneva (Switzerland)
5. Osaka (Japan)
7. Seoul (South Korea)
7. Copenhagen (Denmark)
7. New York(US)
10. Tel Aviv (Israel)
10. Los Angeles (US)
Inflation and volatile currency fluctuations helped drive changes in this year's ranking, with places like Argentina, Brazil, Turkey and Venezuela all seeing a sharp fall in their cost of living ranking.
Caracas in Venezuela, where inflation neared 1,000,000% last year forcing the government to launch a new currency, was ranked the least expensive city in this year's survey.
The price of a cup of coffee in the capital Caracas doubled to 400 bolivars ($0.62; £0.50) in the space of only a week last December, according to Bloomberg.
Damascus in Syria was ranked the world's second cheapest city.
The Economist Intelligence Unit said a "growing number of locations" were becoming cheaper because of the impact of political or economic disruption.
The 10 cheapest cities in the world
1. Caracas (Venezuela)
2. Damascus (Syria)
3. Tashkent (Uzbekistan)
4. Almaty (Kazakhstan)
5. Bangalore (India)
6. Karachi (Pakistan)
6. Lagos (Nigeria)
7. Buenos Aires (Argentina)
7. Chennai (India)
8. New Delhi (India)