Singapore is one big city itself, and is not sub divided into smaller cities, therefore, this question is irrelevant.
On a more relevant note, the total population of Singapore in 2010 is 5076700.
Actually there are 19 countries smaller than Singapore in area; the smallest independent nation is Vatican City.
The largest cities in Singapore are Singapore City, Jurong West, Woodlands, Tampines, and Sengkang. Singapore City is the capital and largest city in the country.
The Vatican city has the smallest population in Europe.
The Vatican City has the smallest population in the world, with less than 1,000 residents.
To answer your question, the city with the smallest population is West New York Town, New Jersey.
Vatican City is the smallest state. It has a population of 700 people.
The smallest city in Pakistan by population is Chagai in Balochistan province with a population of around 3,000 people.
The smallest city in Pakistan by population is Warburton with a population of around 10,000 people.
Singapore does not make the current top lists as being the smallest country in the world. Even though it is only a 246 square mile country, there are other countries that are much smaller such as Malta.
The capital city with the smallest population is Ngerulmud, the capital of Palau. Ngerulmud has a population of around 250 inhabitants.
The smallest city in Venezuela is Maroa. The estimated population of the city is 890. The city was founded in 1760.
Vatican city is considered the country with the smallest population. But if you don't count Vatican city as a country, then it would be a tie between Tuvalu and Nauru (population undetermined but estimated at 10,000).