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Africa has three megacities: Lagos, Cairo, and Kinshasa.

They’re growing super fast, but also growing wrong.

Today, I’ll introduce you to the idea that Africa’s “megacities” might actually be too small.

But before we get into it.

Now, let's get into today's edition.

It's the continent's biggest megacity, home to its busiest ports, its flashiest fintechs, and more unicorns than any other African city.

It's also a city where 70% of the population lives in slums.

Sit with that for a second. 

The city with the most economic firepower on the continent can't house, water, or employ most of its own people. 

Only 35% of metropolitan Lagos has access to the public water supply. 

About 65% of its workers, some 5.5 million people, earn their living in the informal economy, and in the city's informal settlements; and roughly one in four residents has no work at all.

Lagos isn't the outlier. It's more of a template. 

Across the continent, informal work covers about 76% of Africa's urban workforce, the highest share in the world, far above the global average of 44%.

Cairo and Kinshasa, Africa’s two other megacities, are the same way.

So here's the question this piece is chasing: how can cities be this big, this rich on paper, but still broke (and broken) in real life?

In 2017, the World Bank published a report called Africa's Cities: Opening Doors to the World. It runs 166 pages, but the diagnosis fits in three words: “crowded, disconnected, and costly.”

Crowded is the part you already know, but the report's sharpest line gives it teeth: Africa's cities are “crowded with people, not dense with capital.” 

The people showed up. The pipes, roads, houses, and jobs didn't.

Disconnected is subtler, and more damning. Compared to cities in Asia and Latin America, African cities have 40% fewer neighbours to interact with, and 20% more fragmentation near the city centre. 

Our cities aren't networks. They're archipelagos; islands of activity separated by traffic, swamp, and dead space.

The third part, Costly, is what follows from the first two. African cities are about 30% more expensive than cities in countries at similar income levels, and housing alone costs households 55% more than it does anywhere else in the world. 

That kicks off a doom loop for business: expensive city → firms must pay higher wages → firms become less competitive → global investors look elsewhere → the city stays poor → the city stays expensive.

Those gated enclaves in Ikoyi and New Cairo, where the wealthy buy privately the amenities the city can't provide publicly, aren't the cause of the cost problem. They're the residue of it. 

They're what's left behind by all the investment that looked at the megacity and stayed away.

My working theory was that these cities are physically too small. 

Lagos is tiny, but it’s roughly twice the size of London.

Cairo is also cramped. Surely they just need more land?

Except Lagos has been expanding like crazy. Its physical footprint nearly doubled in just over twenty years. 

The metro area burst past Lagos State's borders back in 2006 and now spills deep into neighbouring Ogun State. 

Cairo went even further. Egypt built entire satellite cities and a brand-new administrative capital in the desert. 

Did any of it make these cities more liveable? Not really. Because the problem was never the amount of land. It's what's on it.

The Atlas of Urban Expansion measured how Lagos grew between 2000 and 2013: only 30% of new construction filled in existing gaps. 

Another 14% literally leapfrogged over empty land; fragments of the city jumping ahead of the roads, pipes, and power lines that were supposed to follow, and mostly never did.

So the cities are getting bigger. But they’re getting bigger the way soup gets bigger when you add water. 

More Lagos, but with the same resources spread thinner, and the people more disconnected than ever.

The 5 am bus from Mowe or Ikorodu isn't a commute. It's a daily border crossing. 

This disconnection comes with a real human cost.

Now let's talk about the cost nobody puts in a spreadsheet.

If you live in an African megacity and you're not rich, your life runs on fixed rails. Home to work. Work to home. Church or mosque on the weekend. That's it. 

Moving around costs money: bike fare, bus fare, fuel, hours of your life. So unless a trip is essential, you don't take it.

Why does this matter? Because cities create wealth through collisions. Random ones.

The stranger who becomes your co-founder. The market you wandered into. The conversation you overheard at a bukka. Economists call it agglomeration. 

We'll call it what it actually is: luck. Luck needs collisions.

Remember that stat, 40% fewer neighbours to interact with? 

That's more than an urban planning number. It’s a measurement of how much luck is missing. 

A city where movement is unaffordable is a city that has switched off its own core feature. 

Millions of Lagosians know the opportunities are out there, somewhere across the bridge. They just never get to collide with them.

It’s the serendipity tax, and it’s the most expensive thing about Africa's megacities that doesn’t show up on a receipt.

So where do people go when the megacity taxes their luck and jacks up their rent? Down a tier.

They move to “Secondary Cities”, cities that are growing and have strong economic activity, but are nowhere near a megacity’s size and scale.

Africa's secondary cities are now the fastest-growing cities on the continent, some expanding at up to 9% a year, fast enough that analysts have started calling them “Africa's next big investment opportunity.” 

The World Bank expects these cities to absorb most of Africa's urban growth over the next twenty years, because they still have the three things megacities have run out of: space, affordability, and headroom.

Some tech founders figured this out early. 

HeyFood built a food delivery company out of Ibadan, got into Y Combinator, then expanded into Abuja and Abeokuta months before Chowdeck showed up. 

Terra Industries built Africa's largest drone factory in Abuja and has raised $34 million to become the continent's first defence prime, all from a 15,000-square-foot facility nowhere near Lagos.

The maths is simple. These cities are cheaper to run in, cheaper to market from, and have less competition. 

HeyFood found that a billboard in Ibadan costs 3–6x less than one in Abuja, and Abuja is itself the cheap option next to Lagos.

To be clear, Lagos is still the economic final boss. Many companies launching in tier-2 cities currently see it as a launchpad, not a finish line. 

HeyFood's own Head of Growth put it plainly: “Own Lagos, and you own 50–60% of the Nigerian market; every other city splits the rest.” 

The megacities are still the prize for companies, but for everyday people, they’re increasingly less so.

This brings us to the core question…

Which cities are developed enough for economic mobility, not broken enough to drop your quality of life? Here's our watchlist.

Notice the pattern. 

Every city on this list has a big university, a real economic anchor, whether that’s a port, a farm belt, or an industry, and proximity to a megacity market without megacity costs. That's the formula.

Yes, but not in a literal sense. They’re not necessarily short on land. 

They're short on everything you're supposed to put on it: pipes, transit, housing, and the cheap, frictionless movement that lets people live well and collide with their luck.

Fixing that will take decades of unglamorous work.

In the meantime, the smartest bet on African urbanisation might not be the megacity at all. 

It might be the university town two hours away, where the rent is low, the talent is hungry, and the roads are free.

Africa needs its megacities, but they can’t be all she has.

Which other tier-2 cities do you think we should look out for and why?

Let me know here.

That’s it for this week. See you on Sunday for a breakdown on This Week in African Tech.

Cheers,

The Tech Safari Team

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