People ask this question for different reasons. Some want to move. Some want to travel. Some are chasing business opportunities. The answer changes depending on what you are measuring, and most lists online mix up the categories without telling you.
So here is a clear breakdown. Population, liveability, tourism, business, safety and growth. Each category has its own top 10, and I will tell you what the data actually means.
What Are the Top 10 Most Populous Cities in the World?
Population rankings depend on whether you count the city proper or the wider metro area. Metro area is the more useful number because it reflects how many people actually live and work in that urban zone.
- Tokyo, Japan — 37.4 million
- Delhi, India — 32.9 million
- Shanghai, China — 29 million
- Dhaka, Bangladesh — 22.4 million
- São Paulo, Brazil — 22.4 million
- Mexico City, Mexico — 22 million
- Cairo, Egypt — 21.3 million
- Beijing, China — 21.2 million
- Mumbai, India — 20.7 million
- Osaka, Japan — 19 million
Tokyo has held the top spot for decades. What I find interesting is that three of the top ten are in South Asia, and that number is going up. By 2035, Delhi is projected to overtake Tokyo according to UN World Urbanization Prospects data.
Big population does not mean better city. It means more pressure on infrastructure, housing and transport. The cities that handle that pressure well are the ones worth paying attention to.
Which Are the Top 10 Cities to Live in Globally?
The Economist Intelligence Unit Global Liveability Index and Mercer Quality of Living Survey are the two most cited sources here. They measure stability, healthcare, culture, environment, education and infrastructure.
In my experience reading through these reports year after year, the same cluster of cities keeps appearing at the top. What they share is strong public transport, low crime and reliable healthcare.
- Vienna, Austria
- Copenhagen, Denmark
- Zurich, Switzerland
- Calgary, Canada
- Vancouver, Canada
- Geneva, Switzerland
- Frankfurt, Germany
- Toronto, Canada
- Amsterdam, Netherlands
- Melbourne, Australia
Melbourne held the top spot on the EIU index for seven consecutive years before Vienna took over. What I saw in that period was that Melbourne's public transport network, cultural infrastructure and healthcare access were the main drivers of that score. The city scored consistently above 95 out of 100 across most categories.
Vienna now leads because of its combination of low cost relative to income, excellent public transit and political stability. Copenhagen follows closely, driven by cycling infrastructure and healthcare quality.
What this list tells you is that mid-sized cities in stable democracies outperform megacities on liveability. Tokyo is enormous but ranks lower because of cost and work culture pressures. New York does not make this list at all.
Which Are the Top 10 Cities for Tourism in the World?
Mastercard's Global Destination Cities Index and Euromonitor International both track international overnight visitor numbers. These are the most reliable tourism rankings available.
- Istanbul, Turkey
- London, United Kingdom
- Dubai, UAE
- Paris, France
- Bangkok, Thailand
- Singapore
- Tokyo, Japan
- New York, USA
- Barcelona, Spain
- Amsterdam, Netherlands
Istanbul moved to the top spot in recent years, pulling over 20 million international visitors annually. What drove that was a combination of low cost for Western tourists, direct flights from almost everywhere and a genuinely dense concentration of historical sites.
Dubai's rise is worth noting. In 2010 it was not in the top 10. By 2023 it ranked third. The city built its tourism numbers through airport connectivity, tax-free shopping and large-scale events. It is a manufactured tourism economy and it worked.
Paris and London are consistent because they have deep cultural infrastructure built over centuries. You cannot replicate that quickly.
Bangkok remains one of the best value tourism cities in the world. High visitor numbers, low cost, strong food culture and good transport within the city.
What Are the Top 10 Cities for Business and Economy?
The Global Financial Centres Index (GFCI) published by Z/Yen and the China Development Institute ranks cities on business environment, financial sector development, infrastructure, human capital and reputation.
- New York, USA
- London, United Kingdom
- Singapore
- Hong Kong
- San Francisco, USA
- Shanghai, China
- Tokyo, Japan
- Los Angeles, USA
- Beijing, China
- Sydney, Australia
New York and London have traded the top two spots for years. What keeps them there is depth of capital markets, legal frameworks that protect business and the concentration of financial talent.
Singapore punches well above its size. A city of 5.9 million that ranks third globally for business. What I found when looking at the data is that Singapore's tax structure, ease of company registration and geographic position as a gateway to Southeast Asia are the core reasons. The World Bank ranks it consistently in the top 3 for ease of doing business.
Sydney makes the top 10 as the financial hub of the Asia-Pacific region outside of Asia itself. It benefits from time zone positioning, English language, strong legal institutions and proximity to Asian markets.
Which Are the Top 10 Safest Cities in the World?
The Economist Intelligence Unit Safe Cities Index measures digital security, health security, infrastructure security and personal security across 60 cities.
- Copenhagen, Denmark
- Singapore
- Toronto, Canada
- Melbourne, Australia
- Sydney, Australia
- Tokyo, Japan
- Amsterdam, Netherlands
- Wellington, New Zealand
- Hong Kong
- Osaka, Japan
Copenhagen leads on personal safety and digital security combined. Singapore leads on infrastructure security specifically, which covers things like transport safety and emergency response systems.
What I find striking is that Tokyo and Osaka both appear despite being megacities. Most large cities see safety scores drop as population rises. Japan is an exception. Low violent crime rates, strong community norms and well-funded public infrastructure keep both cities near the top.
Melbourne and Sydney both appear, which reflects Australia's low violent crime rate, strong healthcare system and well-maintained public infrastructure. Melbourne's public transport network in particular scores well on infrastructure safety metrics.
Cities in the United States do not appear on this list. High rates of gun violence pull down personal security scores significantly, regardless of how strong other categories are.
Which Are the Top 10 Fastest-Growing Cities in the World?
Growth here means population growth rate, not absolute size. These are cities expanding fastest right now according to UN and Oxford Economics data.
- Dar es Salaam, Tanzania
- Kampala, Uganda
- Kinshasa, Democratic Republic of Congo
- Nairobi, Kenya
- Luanda, Angola
- Lagos, Nigeria
- Dhaka, Bangladesh
- Kabul, Afghanistan
- Karachi, Pakistan
- Kolkata, India
Sub-Saharan African cities dominate this list. Dar es Salaam is growing at roughly 5.7 percent per year. At that rate the city doubles in size every 12 years. What that means practically is enormous pressure on housing, water, sanitation and transport.
In my experience looking at urban growth data, fast growth is not the same as good growth. The cities on this list face serious infrastructure deficits. The question is whether investment keeps pace with population.
Nairobi is the most watched city on this list because it has a growing tech sector, improving infrastructure and a young population. It is the one fast-growing city where economic development is tracking alongside population growth.
FAQ
Which city is number 1 in the world overall?
There is no single answer because it depends on the category. For liveability, Vienna. For population, Tokyo. For business, New York. For safety, Copenhagen. For tourism, Istanbul. Pick the category that matters to you.
Is Melbourne really one of the top 10 cities in the world?
Yes, across multiple categories. Melbourne appears in the top 10 for liveability and safety in major global indices. The EIU ranked it in the top 2 globally for seven straight years. Its public transport network, healthcare system and cultural infrastructure are the main reasons.
Which are the top 10 cities for quality of life specifically?
Vienna, Copenhagen, Zurich, Calgary, Vancouver, Geneva, Frankfurt, Toronto, Amsterdam and Melbourne. This is based on the EIU Global Liveability Index 2023 and Mercer Quality of Living data. These cities score highest on healthcare, stability, culture and infrastructure combined.
Why do American cities not rank higher on liveability and safety lists?
High rates of violent crime, expensive healthcare and infrastructure inequality pull scores down. Cities like New York and San Francisco rank well for business and culture but not for overall liveability or safety.
What makes a city good for business?
Three things matter most. Access to capital, legal certainty and talent. Cities that score well on all three, like New York, London and Singapore, consistently top business rankings. Tax environment and ease of company registration matter too, which is why Singapore outperforms cities ten times its size.
Which city has the best public transport in the world?
Tokyo consistently ranks first for public transport based on punctuality, coverage and passenger volume. Singapore and Hong Kong follow closely. In the Southern Hemisphere, Melbourne's network is one of the most extensive, covering tram, train and bus across a large metro area.
What the Rankings Actually Tell You
When you look at which are the top 10 cities across all these categories, a few patterns stand out.
First, mid-sized cities in stable countries outperform megacities on quality of life. Vienna, Copenhagen and Melbourne beat Tokyo and New York on liveability every time.
Second, Asian cities are pulling ahead on safety and infrastructure. Singapore, Tokyo, Osaka and Hong Kong all appear in safety top 10s. Their investment in public systems is the reason.
Third, African cities are the growth story of the next 30 years. The fastest-growing urban populations are in Sub-Saharan Africa. Whether that growth produces good cities depends on infrastructure investment happening now.
Fourth, no single city tops every list. The best city for you depends entirely on what you are optimising for. Business, safety, cost, culture, climate. Define your priority first, then look at the rankings that measure it.
The data is clear. The cities that invest in public infrastructure, healthcare and safety consistently outperform those that do not, regardless of size or wealth.