Summary
Ask a hundred gamblers which city is the casino capital of the world and you'll get three different answers, each delivered with complete confidence. Las Vegas, Macau, and Monte Carlo all have legitimate claims, but they're not interchangeable. They're solving different problems for different travelers, and knowing the difference before you book matters.
Las Vegas, Macau, and Monte Carlo all get called the casino capital of the world depending on who you ask. None of them is wrong exactly, but they're not the same place aimed at the same person. They differ on games, limits, atmosphere, and the whole underlying logic of why people go there.
The games
Baccarat is the dominant game in Macau by a wide margin. It drives the overwhelming majority of casino revenue in the region, and the rooms reflect that: massive baccarat pits, often with high minimums, designed around serious volume. Slots and other table games exist but feel secondary.
Las Vegas is more diverse. Blackjack, craps, poker, roulette, and slots all have strong representation. The poker room culture in Vegas is unlike anywhere else. The WSOP runs there, the major cardrooms are genuinely world-class, and recreational players can find low-stakes tables at almost any hour.
Monte Carlo's Casino de Monte-Carlo offers the European classics: roulette (single-zero, which matters), trente et quarante, chemin de fer. It's not a place you go to play slots or sit in a poker room. It's a formal gaming environment with dress codes and table minimums that filter out the merely curious.
The limits
Macau has the highest table limits in the world. In the VIP junket rooms, the numbers get into territory that most people only read about. But baccarat minimums on the main floors can also be aggressive. It's not always a budget-friendly destination for casual players.
Las Vegas has the widest spread. You can find $5 blackjack at some locals casinos. You can also play at minimums that would embarrass most European establishments. The Strip and the downtown are two different markets.
Monte Carlo is expensive by the standards of recreational gambling. The dress code and entrance fee at the Casino de Monte-Carlo are not formal deterrents exactly, but they signal the room's orientation. It is not built for volume.
The experience
Las Vegas is built around keeping you comfortable: free drinks, cheap buffets (or expensive ones), an entire ecosystem optimized to reduce friction between you and more gambling. It's impressive in a slightly alarming way if you think about it too hard.
Macau feels more transactional on the main floors, especially in the newer Cotai developments. The Venetian Macao and the MGM Cotai are enormous, polished, and somewhat anonymous. The older Peninsula properties like the Lisboa have more texture.
Monte Carlo is the one where the building is actually worth visiting. The Casino de Monte-Carlo was designed by Charles Garnier, the Paris Opera House architect, opened in 1863, and it shows. The gaming experience is almost secondary to the experience of being in the room. That's either a selling point or a problem depending on why you're there.
The verdict
None of these cities is the best overall. Vegas wins on variety and accessibility. Macau wins on scale and baccarat depth. Monte Carlo wins on atmosphere and history. Pick the one that matches what you're actually looking for.