Largest & Biggest Online Casinos

Playing at an online casino offers the advantage of having an extensive games lobby, so you’re probably wondering what the best largest online casinos are available. 

A good large online casino would:

  • Have a games lobby with over 500 slots
  • Offer a wide variety of game types such as Table Games and Progressive Jackpots
  • Offer better welcome bonuses and promotions

If what you’re looking for is a well-established giant, then our #1 pick online casino this month is none other than Ice Casino boasting a win rate of 95.65%. But our list is much more extensive than just one operator, so read on to make the best choice!

Biggest Online Casinos in 2023

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Rank Rating Bonus Safe Link
Best For
  • Fast payouts
  • Live Casino
  • Free Spins
Best For
  • No deposit bonus
  • Tax Free
  • Wide choice
Best For
  • VIP
  • Cashback
  • Live Dealer
Best For
  • Bitcoin Accepted
  • VIP
  • Great offers & promotions
Best For
  • Classic slots
  • Crash Games
  • Fast payouts
Best For
  • Editor's choice
  • Easy registration
  • Quick Withdrawals
Best For
  • 24/7 Support
  • Easy registration
  • Same day payout
Best For
  • 24/7 Support
  • Fast payouts
  • Easy registration
Best For
  • Outstanding VIP Program
  • Live Casino
  • Large selection of slots
Best For
  • Easy registration
  • Player's Choice
  • Generous welcome bonus
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What Makes Large Casinos Great?

The largest online casinos are able to give an unparalleled experience for online gambling. With the best range of games, a huge slot game volume and some of the best industry bonuses, large casinos have the best of the best available to them. Some smaller casinos might not have the same resources available.

Pick from the best and biggest range of casino games available. Slots of every kind, including movie themed video slots, classic fruit slots and jackpot slots are all waiting to be played at these casinos. If you’re on the lookout to chase a truly massive win then why not try out one of the many progressive slots you’ll find at these large online casino sites?

How about trying your hand at live casino table games such as poker, baccarat, craps or roulette where you’ll have the chance to play against other punters such as yourself? With plenty of games on offer, such as Casino Hold’em, Three Card Poker, Vegas games and everything in between, table game players will not be disappointed!

Mobile Casino Access

Playing at a large casino also gives you the opportunity to use different devices. Perhaps you want to finally try playing your favourite slots or table games on your mobile device? There’s no better way to be a winner while on the move than by choosing a casino that has a wide variety of mobile online casino games for you to play. Here are the devices they should be available for:

  • Android (72.18% of mobile gamblers use it);
  • iOS (26.96% of mobile gamblers use it);
  • Samsung (0.43% of mobile gamblers use it).

International Access

Most well established online casinos accept players and high rollers from a number of regions, as long as it's legal to play in that certain jurisdiction. For instance, whether you're looking for the best Canadian online casinos or the largest casinos in the UK, chances are that the largest ones accept all players. In some cases, there are specific legal requirements for a casino such as any of the best online casinos in Germany. However, these casinos must accept players coming from the top 5 countries with most gamblers:

  1. Ireland;
  2. Canada;
  3. The United States;
  4. United Kingdom;
  5. Germany.

Huge Range of Games

Last but definitely not least, a great reason to play at huge online casino sites is due to the range of games available that you may not find at smaller casinos. These are games other than slots and table games, but rather the more casual games such as scratch cards, bingo games, lotteries and so much more!

The possibilities are endless when playing at the best online casino sites boasting large catalogues of games from different software providers, so be sure to try out one of the many options we have listed on this page. Here are some numbers for casinos to be considered BIG:

  • Slots: 500 or more;
  • Table Games: 30 or more;
  • Live Games: 30 or more;
  • Skill Games: 10 or more;
  • Video Poker: 20 or more.

Responsible Gambling Commitment

Big online casinos are also responsible. In the best UK casinos or the European casinos in general, you will find a lot of attention when it comes to playing responsible online. These casinos have different measures to ensure you won't exaggerate and play the money you don't need. Here are some options available on these largest (and responsible) casino sites:

  • Deposit limits;
  • Withdrawal limits;
  • Game session limits;
  • 24/7 helpline;
  • Link to or similar.

Wide Choice of Payments

Whether you play the casinos licensed from the UK Gambling Commission or the famous Malta Gambling Commission, or any other respected legislator, you will find a wide choice of payment methods to play. The largest online casinos offer payment options such as debit cards or e-wallets, Neteller, PayPal, Skrill, Bitcoin (where legal) VIP Preferred and many other methods available for quick withdrawals and easy deposits. At large casinos, it is more likely to find local payment methods. For example, casinos accepting iDEAL deposits are preferred by Dutch players. Here are some of the common options in these casinos:

Huge Range of Games

Last but definitely not least, a great reason to play at huge online casino sites is due to the range of games available that you may not find at smaller casinos. These are games other than slots, free play and table games, but rather the more casual games such as scratch cards, bingo games, lotteries, and so much more! You will also have a higher chance of finding new games like crash gambling game options.

The possibilities are endless when playing at the best online casino sites boasting large catalogues of games from different software providers, so be sure to try out one of the many options we have listed on this page.

Which are the biggest online casinos?

Largest Online Casinos So Far

At a glance, here are some of the biggest online casinos you can find that we have reviewed. Click on each casino to read the review and see what bonus is available today to play with real money:

RankingCasinoGamesWin Rate
2GG Bet Casino
3Jackpot Village Casino1200
4BC.Game Casino67097.68%
5Vulkan Vegas Casino
7Ivibet Casino50097.63%
8Nords Casino
9Royal Stars Casino150097.43%
10Tsars Casino350097.03%

You can also have a look at which new online casinos are trending right now on our special designated page!

Games Available at Large Casinos

You can find a wide array of different online live casino games, ranging from well-known games to the most obscure niches. Here you will find the most common slot machines, with a good payout, from popular providers like Starburst by NetEnt as well lesser-known and independent software developers like Playtech or StormCraft Studios.

Best Online Slots

Players are always on the lookout for a great slot. When you first start on your online casino journey, opting to play at a large casino might be the best way to go, as you can try many different slot games to find out which ones you like best. The largest online casinos tend to have some of the best game providers and many slots.

Keep in mind the best online slots can be divided into several categories. We have selected these categories below, with 3 games for each. The biggest casinos can't miss these titles, at least if they want to keep their reputation and weight.

Classic Slots

If you discover that you’re a big fan of the classic pub slots with 3-reels and easy gameplay, then Merkur, Pragmatic Play, IGT, and Novomatic are the software providers with the best games for you. Veteran players love these games, and you should check them out:

  • Mega Joker;

  • Break da Bank;

  • Ultra Hot Deluxe.

Video Slots

If you prefer fancy and flamboyant video slots or VLT with a good RTP and exciting graphics and lots of different features, then games by Thunderkick, Yggdrasil Gaming, Red Tiger Gaming, and Play’n Go are more up your alley. When you land on the biggest online casino in the world, please, check for these games:

  • Gonzo's Quest;

  • Wolf Gold;

  • Book of Dead.

Jackpot Slots

Adding up to a huge total win, jackpot online slots can have potential wins in the hundreds of thousands if you hit the lucky combo on the reels. These tend to be specialities of the largest online casinos, meaning you are more likely to find these amazing deals when playing at the biggest jackpot slot casinos. Go and play these games in the largest online casinos:

  • Mega Moolah;

  • Divine Fortune;

  • Megabucks.

Megaways Slots

When people play the biggest slots, sometimes you want to spice up the gameplay – and Megaways slots make that excitement happen! Megaways Slots are a staple of the biggest online casinos, as they tend to be a reworking of some of the biggest names, such as Gonzo’s Quest, brought to you by Big Time Gaming and Red Tiger. Here are our top megaways slots:

  • Buffalo Rising Megaways;

  • Medusa Megaways;

  • Montezuma Megaways.

The biggest live casino tables

Wide Range of Table Games

A large casino usually has a huge variety of different tables. Ranging from the standard roulette and blackjack versions to various video pokers and other games like Sic Bo, Pai Gow and Red Dog, players can get the best gaming experience.

Large casinos usually have dedicated casino bonuses available for players who prefer these games to sweeten the deal even more. This means that slot players and casino players can enjoy fantastic bonuses, free spins, free bets, and no deposit bonuses on their favourite games.

When you visit large casinos, do not forget to check out their casino and table games section for the latest and best game offerings.

Live Casino Tables

Nowadays, a live casino is essential. The largest online casinos know this, and they strive to offer a full solution of live dealer games to their players. It's almost impossible to find a casino without a live dealer section. You can find many professional dealers speaking different languages too. Here are the live games big casinos cannot miss:

  • Roulette Live;

  • Blackjack Live;

  • Football Studio.

Bingo and Instant Wins

Instant win games, like scratch cards and lottery tickets, are often found under the games section of larger casinos. Simply place your 1st deposit and select your preferred game to reveal your instant prize. If you are lucky, you might be in for a quick win! The best thing about the instant win and scratch cards is that the casino offers them for mobile devices, meaning you can easily play these games on the go. Here are the unmissable games:

  • Pig Wizard;

  • Wish Upon Jackpot;

  • Lucky Numbers.

Huge Progressive Jackpots

If you are a gambling industry veteran, you must know the big casinos usually have the biggest jackpot slots. Casinos featuring progressive jackpots are the ones to watch out for in particular – every spin by every player stands to increase the jackpot! With the arrival of Megaways slots on the scene, these jackpots only stand to increase further!

Check out the gambling sites on this page to redeem the best offers in the online gaming industry. T&Cs apply to each offer you select; make sure to read them and some info about the gambling companies of your choice before making a deposit.

  • Bonanza Megapays;

  • Queen of Alexandria;

  • Arabian Nights.

Large Sportsbook Section

If you know our website, you know we're all about casinos. However, a decent sports betting platform offer can't be missed in the biggest online casino in the world. There are so many sports out there and so many winning opportunities that it is almost impossible to find a website without a sports section.

Largest Online Casino Bonuses

By choosing to play at a large casino, you have the freedom and variety to try out all of these games. The best thing is, large casinos know that they have lots to choose from, hence why they often have the ability to try out a few with different sign-up bonuses or even play for free modes. But what bonuses can you benefit from at a casino? We've laid out some of the most common casino bonuses below. Keep in mind all the bonuses listed are valid for the first deposit of new players, and there are some wagering requirements.

Bonus funds, bonus spins and all the promos you get when depositing are intended to be played accepting the terms and conditions (read the full T&C before playing) you'll need to accept as new customers. Most of the promos in the largest casinos need a minimum deposit before receiving the bonus money.

The most common casino bonuses you can find are deposit bonuses (including welcome package bonuses and reload bonuses). However, it is not uncommon to see cashback bonuses and VIP and loyalty bonuses in many of the largest casinos. VIP and Loyalty programs are not often found on smaller casinos so that the best ones can be found on the largest casinos. The gold standard of great casino bonuses is if you can find an online casino with free bonus, no deposit required.

Largest Casinos in the World

We know the story: different casinos, different licenses. For this reason, the world's biggest online casino won't be the same in the UK and Canada. We have divided the list of the largest casinos by country, to give you a better overview of them.

Largest International Casinos

There are plenty of casinos in the world, and most of them are very active with advertisements on TV and social media, suck as PlayOJO or Grosvernor – but there are a few which are the biggest movers and shakers. So with the biggest online casinos being some of the best value for players, we’ve put together a few top lists to help you pick.

RankingCasinoPayout SpeedWin Rate
1Vulkan Vegas2 days97.39%
2Lyra Casino2 days97.22%
3Barz Casino1-5 days97.33%
4888 Casino3 days95.10%
5GG Bet Casino2-3 days97.03%

Largest Casinos in the UK

Some of the casinos in the UK with the biggest payouts are the biggest casinos in the industry. With so many to pick from, all licensed with the UKGC, it could be hard to make a decision as to which to pick. We’ve handpicked some of the largest online casinos in the UK, that promise the biggest British casino bonuses and huge amounts of fun. We suggest checking UK PayPal casinos to make your deposits and withdrawals easy as anything.

RankingCasinoPayout SpeedWin Rate
1888 Casino2 days97.39%
2Mr Vegas Casino2 days97.22%
3Barz Casino1-5 days97.33%
4Betstorm Casino3 days95.10%
5Casumo Casino2-3 days97.03%

Largest Casinos in the EU

Playing in the EU? There are plenty of casinos licenced across the continent, including European online casinos which accept UK players. If you are looking for online casino Germany however, there are a few extra rules involved so be sure to check that they are following the legal requirements. Whether you want to play classic slots or take a spin on the biggest jackpots European casinos have to offer, there’s plenty to find in the largest European online casinos. Here are a few of our favourites

RankingCasinoPayout SpeedWin Rate
1Vulkan Vegas Casino2 Days97.04%
2Barz Casino2 Days96.20%;
3Lyra Casino3 Days97.40%
4GG Bet Casino2 Days96.68%
5MegaSlot Casino2-5 Days97.15%

Largest Casinos in the US

There are quite a few big players when it comes to the best US online casinos – from the popular online sweepstakes casinos to the online versions of some of the biggest casinos in the business, there’s plenty to pick from if your state is one of those which allows for online gambling!

RankingCasinoPayout Speed
Win Rate
1Gambino Slots2-5 Days94.12%
2Draft Kings2 Days
3Luckyland Slots Review
2 Days
4Chumba Online Casino2 Days
5Global Poker
2 Days

Largest Casinos in Asia

Asia is wide and there are casino players from Indonesia and experienced gamblers from Vietnam, looking for those wide casinos with hundreds of games online. Here's a list for them, with the biggest casinos accepting Asian players to gamble:

RankingCasinoPayout SpeedWin Rate
1888 Casino2 Days97.68%
2Betway Casino
2 Days97.39%;
3Yaa Casino3 Days97.40%
4Rizk Casino2 Days96.68%
522Bet Casino2 Days98.28%

Largest Casinos in India

India has some unique features, and one of these is the huge number of gamblers. Among the best online casinos in India, there are some giants we are going to list below. What we have considered? Easy: number of games, players, licenses, years on the market and general reputation:

RankingCasinoPayout SpeedWin Rate
1Vulkan Vegas Casino2 Days97.04%
2Barz Casino2 Days98.05%
3MegaSlot Casino
3 Days96.72%
4Jackpot Village Casino3 Days96.50%
5GG Bet Casino
2 Days98.28%

Pros and Cons of These Casinos

There are advantages and disadvantages to every casino, but what is there to gain and avoid when it comes to the biggest online casinos? Let's have a look at the pros and cons brought by our team of experts.

  • Wide selection of games and slots
  • Better welcome offers and bonuses
  • Many licenses acquired
  • Customer service available in more hours
  • More general, and less targeted

Should You Play the Largest Online Casinos or Not?

When it comes to choosing between the small or the big online casinos, with real money or a sweepstakes casino, it becomes very personal. Some people love the feeling of being part of something big, while others feel the opposite. Personally, we trust the largest casinos because they have more experience in dealing with customers and solving any kind of problem.

The bonus offers will be bigger and the selection of games too. The biggest casinos usually have a great VIP scheme, where you can increase your status and get nice bonuses. Also, due to the many licenses they may have, you can play under different jurisdictions, even when abroad. 

If you are a new casino player, we suggest you create a gaming account on one of these casinos, in order to have a better casino experience and no problems during the deposit or cash out of your winnings. Experience matter when it comes to online gambling, keep it in mind.

Big Online Casinos FAQs

Do the biggest online casinos offer better welcome bonuses?

Yes and no - it depends on the casino itself! The biggest online casino are generally able to offer a larger welcome bonus or deposit bonus, for example, but it doesn't always follow that they will choose to. Check the bonuses available to you on our top lists to see!

What benefit is there in playing with the largest casinos?

They have the capacity to offer some of the best bonuses and promotions, often without a casino promo code. They also have the best range of casino games and often have 24/7 customer support.

Can I get a no deposit bonus at the largest online casinos?

Yes, many of the largest online casinos offer amazing no deposit bonuses when you register! Simply check out the bonuses or promotions page of the casino you want to play at to find out how to play with these bonuses.

What are the largest online casinos?

The largest online casinos are Unibet, 888, Betfair and William Hill.

Giuseppe Faraone
Author & Online Gambling Expert Giuseppe Faraone verified symbol
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Based in Valencia, Spain, Giuseppe gave up Milan for sunny shores. New licenses, new casinos, new bonuses, new games - there's always something to write about. Being so close to the action in the gambling industry, he's on top of any new developments the minute they come through the door. Aiming to deliver updates and comprehensive information to you, he does his best to test out and rate what he reviews thoroughly. Giuseppe is also a book writer. In October 2022, he published his first book called The Untold Story of Online Gambling, available on Amazon.
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