Which is England’s second city?

Well, it all sort of depends.

Have we passed peak London?

Signs and portents.

The US has become a nation of suburbs. But will it stay that way?

Millennials are killing the suburbs too. Typical.

Which is the largest city in Europe?

The dark star meets its match

Where do Britain's graduates move to – and why?

Exploring the brain drain.

Sorry, northerners, but London’s tube strike is national news

“Not everyone lives in London you know!”

Where are the world's largest cities?

For all your demographic needs.

Are booming cities always growing cities too?

It's the economy, stupid.

What are the largest urban areas in Britain?

Britain's cities, ranked.

How do population projections work?

Some educated guesswork.

Where are the largest cities in Britain?

Asking the big questions. (Geddit?)

The rebirth of Britain's inner cities, mapped

The city is up, and the suburbs are down.

We think of Canada as a long way north – but half its population lives south of Milan

The average European lives a long way north of the average Canadian.

Where are largest cities in the world? 2015 edition

Don’t pretend you’ve not been wondering.

8 more ways of visualising London's growth: a question of density

Part 3: Why London is very, very weird.

10 ways of visualising London's growth

Part 1: Drawing the boundaries.

The cities of southern England are undergoing a population boom

But growth creates its own challenges.

The cities of southern England are undergoing a population boom

But growth creates its own challenges.

Charts: Birmingham has nearly as many atheists as Muslims

Debunking the Fox News terrorism expert.

This is the week when London's population will finally overtake its previous peak

How does a city bounce back from losing 2.3m people?

US cities are light on veterans

Big cities are less appealing once you've been to war, apparently.

A crowded city is the sign of a good thing for Indonesians

Policymakers should embrace urbanisation as a sign of success.

Chart: Eastern Europe's incredible shrinking cities

Too many migrants; not enough kids.

What is a city, anyway?

It's a much more complicated question than you might think.

The urban revolution

What it is – and why it matters.

People don’t leave London at the rate they once did

This is probably one reason house prices are climbing.

It's time to work out which green belt land we should build on

It's not all the North Downs, you know.