Best Online Slots for US Players


Alex W



Huge sports fan. Football & MLS fanatic. Lover of all things gambling - Sports betting, Casino, Poker and of course, Las Vegas.

With the rise in legal online casinos across the US, online slots have become a huge source of entertainment for players.

Players can discover thousands of exciting online slot games to play remotely at their fingertips. You can play online slots with real money in the US or free slots from your laptop, PC, or smartphone.

At Gamble-USA, we have everything you need to know on the best online slots from the most well-known and reputable developers. Each of our recommended slot machines is regulated and licensed in the US so that you can play online slots securely at legal casinos in your state. Our team of experts has written hundreds of slots reviews searching for the top real money slots and free online slots with free games to improve your knowledge and skill.

In addition to providing an online slots guide, if you are wondering where to play online slots, we’ve got you covered. We have provided a list of the top regulated online slot casino sites where you can play classic slots online, featuring modern bonus features and progressive jackpot slots. Each online casino on this page is home to hundreds of exciting online slots games playable for real money. Read on to discover the best online slots to play with real money and sign up today to claim your free spins bonus.

Best Slot Sites Online

If you are looking for a slot game providing excitement, bonus rounds, and innovative features, you will find that and more at these real money gaming sites. Our top online gambling sites offering the best online slot machines include:

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Looking to play online slots in the US? Then these 5 operators offer the best choice of slot games, bonuses, and promotions:

Slot fans in the US now have a fantastic range of licensed and legal operators available online. They offer the Las Vegas slots experience right on your computer, or on a mobile slots app.

BetMGM Casino

BetMGM Casino is the online casino of the world-famous MGM Resorts International. They are one of the biggest and most well know casino groups on the planet and pretty much own all the best hotels in Vegas. The best slots at BetMGM casino include classics such as Book of Dead and Starburst. Additionally, DraftKings slots and FanDuel Casino slots offer numerous types of slot games, from Vegas slots to progressive slots and more.

Welcome Bonus: $25 Free Play & $1,000 Deposit Bonus

Site: casino.betmgm.com

Read more: BetMGM Casino review

BetMGM casino slots

DraftKings Casino

DraftKings may be better known for offering DFS and more recently, sports betting, but they also have one of the best licensed US casinos offering a huge range of slots. Some of the best DraftKings slots include Gonzos Quest, 88 Fortunes, and Bonanza. Games are provided by some of the biggest slot providers in the industry and are all on a simple and easy to use platform.

Welcome Bonus: $50 Free Play & $1,500 Deposit Bonus

Site: casino.draftkings.com

Read more: DraftKings Casino review

Golden Nugget Online Casino

Perhaps one of the best know names in the casino industry, the Golden Nugget Online Casino is the online provider of the world-famous Golden Nugget. Available in several US states, they have one of the biggest slot collections available online. Play all the favorite titles you would find at the Las Vegas casino right from your mobile or PC. You can read more about the full list of titles, including our pick of the best slots at Golden Nugget in our guide.

Welcome Bonus: $20 Free Play & 100% Bonus Up To $1,000

Site: casino.goldennuggetcasino.com

Read more: Golden Nugget Online Casino

Golden Nugget Slots online

How We Choose Best Online Slots For Real Money

We don’t select the best online slots for real money at random or because we like the title. When you want to play slots online, there are various factors to consider. We recommend only the best online casino slots. The points below are what we look for when ranking and reviewing online slot machine games.

Game Design

You don’t want to risk losing money on a boring slot game; as part of our slot game reviews, we lookout for graphics and playability. Players have the opportunity to test out the slot in the free demo play mode if they are hesitant and just want to test the waters.

RTP (Return to Player) Percentage

You will often hear the phrase ‘highest RTP slots‘ when delving into the online gambling world. All real money online slots have a return-to-player percentage (RTP).  This refers to the average return made to the player. The best slots will have an RTP of 95-99%. You can view payment information via the slot paytable. Additionally, some operators list this information within their FAQ or Help sections.


All real money slot games come with variance or volatility. Low-variance slots pay multiple small and frequent payouts. The volatility is the amount a slot pays out. High-variance slots payout more but not as frequently.

Licensing & Safety

Your money and personal details should always be safe whenever you play online slots for real money. Our recommended online casinos are all licensed in the US, and the games are tested for fairness before they are available online.

Types Of Online Slot Games

When choosing which slots to play online, it is helpful to know the various slot types available. The differences between two slot games could have massive repercussions on your jackpot amount, gameplay, and strategy.

To help you make the most of your real money gambling experience, we have listed the different types of slot games below.

Online slots

Real Money Slots

If you select real money slots, you can win huge jackpots online. Wagers can be as small as a penny for low rollers or in the hundreds for those playing for higher stakes. All of the classics and best new slots are online, and players now have the ability to play on the go via mobile casino apps.

Free Slots

Free slots mean players can enjoy their favorite slot titles without risking any money. There is no compromise on the quality of the graphics and gameplay just because these are free slots. Consequently, this means they are the perfect option for players that want to try new titles to see if they are worth playing for real money or practice slot strategies.

Vegas Slots

Slot machines from the famous Las Vegas casinos have been given a virtual makeover. Vegas online slots offer players the same well-known slot titles they enjoyed in physical casinos but with better graphics and bonus games. Slot developers such as WMS, SGi, Bally, and IGT can all be found online.

Progressive Slots

Players can try and win big with progressive slot games online. Every time a bettor makes a wager in this slot game, it gets added to a progressive jackpot until a player lands the winning combination.

There are instances where these slot games can overlap; for example, some online Vegas slots will accept wagers from a penny. However, it is beneficial for players if they know what type of game they are playing so they can grasp how the game operates and ultimately improve their chances of winning. A player interested in the big jackpots found in progressive slots wouldn’t be that bothered with penny slots.

Slot Game Providers

Software developers understand that players these days have high standards when it comes to online slots. Players nowadays expect immersive graphics and music, huge jackpots, considerable bonus games, and features and entertaining themes.

It is no surprise then that slot game providers are in fierce competition with each other to create the next classic slot game. This results in many players actively searching for specific game developers to discover new titles to play. Some of the best designers in the industry today can be found below.


IGT (International Game Technology) is a massive name in the land-based slot machine market. Players will find multiple IGT online and mobile slots at licensed casinos in the USA. The company is responsible for classic games such as 7s Wild and Double Diamond. High rollers are also catered for with big stakes in games like Cleopatra Plus and Gong Xi Fa Cai.


Bally is one of the oldest slot machine manufacturers in America. Bally is part of the Scientific Games giant and supplies top-quality licensed games to prominent online US casinos. Some of the most popular Bally titles include, adapted from land-based versions, include Anchorman, Cash Spin, and Quick Hit Super Wheel.


WMS Gaming/Williams Interactive provides entertaining and exciting slot machines to some of the best casinos in the world. Like Bally, WMS is a subsidiary of SG Gaming (Scientific Games). WMS is known for developing slots games such as Raging Rhino, Montezuma, Fire Queen, and Epic MONOPOLY II.


NetEnt is a Swedish game developer that prides itself on offering unique and exciting slot games to over 300 operators. Gamers will know NetEnt for classic slot games such as Starburst, Gonzo’s Quest, Jack and the Beanstalk, and Jack Hammer.

Slot provider NetEnt


Microgaming is one of the oldest suppliers of online casino game software and has a fantastic reputation in the iGaming industry. The company has enjoyed significant success with games like the Mega Moolah Jackpot slots and the popular 243-way slots such as Thunderstruck 2, Immortal Romance, Jurassic Park, and Terminator 2.

Mobile Slots

One of the best things about the advances in technology over recent years is the development of mobile casinos. Players now have access to their favorite casino games at their fingertips. This means bettors can play online slots for real money through their smartphones or tablet. They can download a native app or log in and play via their web browser. Real money casino apps are widely available, and you can also make deposits using a smartphone.

Mobile slots are different from online slots as they are designed to work on your specific operating system. The screen will be smaller, and players can access crucial information and the paytable with a swipe of a finger. We love playing slots on mobile devices; they are easy to access and make that commute a little bit more exciting!

Downloading a Casino App

The good news is downloading a mobile casino app is a straightforward process.

Android: The Google Play Store has recently softened its stance on gambling apps. Previously, Android slots players would be required to download the app directly from the casino’s homepage. However, they can now head to the Play Store and download from there. For most online casinos, you will need to run Android 5.0 or higher.

iOS (Apple): The best online casinos in the US offer dedicated apps for the iPhone and iPad. Once you have signed up for your account, head to the App Store and begin downloading.

Instant Play Casinos: Multiple regulated casinos allow players to play mobile slots through their browser. Log in to your casino account through your mobile device and load up a game in your mobile browser. Slots programmed in HTML5 work well on whatever platform you are using.

How To Play Online Slots

Online slots feature numerous vertical reels filled with symbols. In every game, the reels spin and will stop at any time, thanks to a random number generator (RNG). This is regularly checked and audited to ensure the games are fair. Players win money by lining up matching symbols on paylines that run across the reels. Typically the paylines run horizontally, although some games feature vertical or diagonal paylines, too.

You must first choose your coin size and the number of paylines you want to wager on. Some games have fixed paylines where you will have to bet on all of the combinations. If you want to know more, then have a read of our online slots guide for some handy pointers and tips for playing.

Online Slot Bonus Rounds

The best online slot machines will have bonus rounds. These bonus rounds can be activated by hitting the required number of scatter symbols, or they just appear at random. The most common slot bonuses include:

Free Spins: Bettors receive several free games, sometimes with a prize multiplier attached.

Wilds: Wilds are joker symbols that assist in completing a winning combination across the reels. Like free spins, sometimes Wilds have prize multipliers attached.

Pick ‘em Bonus: With a pick ’em bonus, players can choose from 10-12 hidden symbols on the screen. Each symbol hides a cash prize, free spins, or multiplier. Players should keep choosing symbols until the “Collect” sign appears.

Prize Wheel: You may get lucky and win a spin of a prize wheel that has free spins, multipliers, or jackpot cash sums.

The above bonus rounds present an excellent opportunity for players to improve their bankroll. Additionally, these rounds don’t just give you more chance of winning some cash, but they are also exciting and entertaining. When deciding which online slots to play, try and choose one that has a significant amount of bonus features.


What online slots pay real money?

The online casinos we have listed on this page all provide hundreds of online slots that pay real money. As long as you play at regulated and legal online casinos, your money is secure, and you are gambling in a safe environment.