By Jane Shaw
Editor at Casinos.US
Updated: October 15, 2024
We count on Jane to inform our readers about the latest slot games in the US market. With her passion for video games and a degree in engineering, she's our gambling tech expert. Jane's also active in our blog section, where she tackles the curiosities and changes in the industry.
We carefully assess licensing when searching for the best slot sites. The casinos we selected are legal and regulated by official gambling authorities who also monitor fair play. We prioritize platforms that take player protection seriously and provide a safe gaming environment.
Next, we proceed by testing the slot libraries. Our experts have chosen platforms with hundreds of games with entertaining storylines, multiple paylines, bonus features, and HD graphics. We tested them firsthand to verify player satisfaction, mobile compatibility, and software quality. Below, you'll find the list of the top-rated online slots sites.
| Online Slots Casinos | Welcome Bonus | Bonus Code | All Slots Games | Mobile Slots | Legal In | Site Rating | Secure Link | Terms |
|---|---|---|---|---|---|---|---|---|
| BetMGM | 100% up to $1,000 + $25 On the House | Not Needed | 684 | 679 | PA, WV, NJ, MI | Play Here! | Valid only for new NJ players over 21 years of age. Opt-in required. Min. deposit $10. Full T&C's apply. | |
| Borgata | 100% up to $1,000 + $20 On Sign Up | Not Needed | 802 | 798 | NJ, PA | Play Here! | Valid only for new NJ players over 21 years of age. Full T&Cs apply. | |
| Betway | 100% up to $250 as Casino Bonus | Not Needed | Play Here! | Valid only for new PA players over 21 years of age. Full T&Cs apply. | ||||
| bet365 | 100% up to $1,000 New Player Bonus | Not Needed | Play Here! | Valid only for new NJ players over 21 years of age. Opt-in required. Min. deposit of $10. Full T&Cs apply. | ||||
| DraftKings | Play $5, get $50 In Casino Credits | Not Needed | Play Here! | Valid for new customers. Must choose 1 offer and opt-in within 7 days (168 hours) of registering a new account. Must deposit min. $5 within 7 days (168 hours) of opting in to earn (a) a 100% deposit match up to $2,000 in Casino Bonus Funds or (b) a 100% deposit match up to $100 Casino Credits. Full T&Cs apply. | ||||
| PartyCasino | 200% up to $200 | Not Needed | Play Here! | Valid only for new NJ players over 21 years of age. Full T&Cs apply. | ||||
| BetRivers | Up to $500 in Casino Losses Back | CASINOBACK | Play Here! | New players only. Min. $10 deposit to quality, CASINOBACK: Bonus money match of casino net losses in first 24 hours of play up to max. designated amount. 1X playthrough requirement on select games. Bonus money expires 30 days from Issuance it playthrough requirement unmet. Full T&Cs apply. | ||||
| Caesars Palace Online Casino | Up to $2,500 Deposit Match | IGCA2500 | Play Here! | Must be 21+ and physically present in MA, PA, NJ and WV only. New users and first deposit. Wager $25+ to receive 2,500 Reward Credits. Full T&Cs and wagering requirements apply. | ||||
| Golden Nugget | Deposit $5 Get $50 in Casino Credits | Not Needed | Play Here! | Valid only for new NJ players over 21 years of age. Bonus offer must be claimed with the first single deposit. Free Spins can only be applied to eligible games. Full T&Cs apply. | ||||
| Virgin Casino | Up to $100 Real Cash Back | Not Needed | Play Here! | Valid only for new NJ players over 21 years of age. Full T&Cs apply. | ||||
| BetOcean Casino | Up to $1,500 + 50 Free Spins | Not Needed | Play Here! | Valid only for new NJ players over 21 years of age. Full T&Cs apply. | ||||
| Hard Rock Bet | 100% Up To $1000 and 500 Free Spins | Not Needed | Play Here! | 21+, Terms and conditions apply. Please gamble responsibly. GAMBLING PROBLEM? CALL 1-800-GAMBLER. | ||||
| Harrah's | 100% up to $100 + 100 Free Spins | Not Needed | Play Here! | Valid only for new NJ players over 21 years of age. Full T&Cs apply. | ||||
| Stardust | 100% up to $100 + 200 Spins on First Deposit | BONUS2 | Play Here! | Valid only for new NJ players over 21 years of age. Full T&Cs apply. | ||||
| PokerStars Casino | 100% up to $600 Deposit Match Bonus | STARS600 | Play Here! | Valid only for new NJ players over 21 years of age. Full T&Cs apply. |
Each of the US online slots sites holds licenses for operating in different states and is regulated by a local authority like the New Jersey Division of Gaming Enforcement and the Michigan Gaming Control Board. Such regulatory bodies also complete audits of RNG games, including slots, to make sure outcomes are fair.
Players have different preferences and priorities when it comes to online gaming platforms. Beginners should remember that there are various types of slots, each offering a customized experience. Some feature simple, classic designs like three-reel slots, while five-reel slots appeal more to advanced players. Explore the options below to find the ones that suit you best.
| Three-reel slots |
|---|
| Best for new players |
| Five-reel slots |
| Suitable for advanced players |
| Progressive jackpot slots |
| Best for higher payouts |
| Multi-payline slots |
| Offer a higher chance of winning |
| Branded slots |
| Provide an immersive experience |
Having access to different types of games means you'll always find something fun. Even if you're an experienced player who prefers progressive jackpots, you might want to switch to a simpler layout or try a branded game inspired by your favorite movie. The recommended platforms offer a balanced mix of all these options.
Three-reel slots are the digital versions of the traditional machines found in land-based casinos. These games usually feature a single payline and fewer symbols to match across the three reels, making them perfect for beginners and those seeking nostalgic gameplay. Two of the most popular three-reel online slots are NetEnt's Triple Diamond and IGT's Mega Joker, both offering simple yet enjoyable gameplay.
These slots feature five vertical reels, offering multiple paylines and intricate gameplay. They often include advanced graphics, complex mechanics, and immersive storylines. Two of the most popular five-reel slots are the cosmic-inspired Starburst by NetEnt and IGT's Cleopatra, known for their entertaining storylines and bonus features like wild symbols and free spins.
Progressive slots are games where the jackpot increases every time a player bets until someone wins. These jackpots can grow to over a million dollars, offering players the chance for larger prizes. NetEnt's Divine Fortune is a favorite among players, featuring an Ancient Greece-inspired storyline and 20 paylines. Another popular option is 88 Fortunes by SG Digital, available at most recommended casinos.
These games feature multiple paylines, sometimes reaching up to 117,649, as seen in the Megaways series. Unlike traditional slots with a single payline, they offer various ways to form winning combinations. Popular examples include NetEnt's Gonzo's Quest, known for its adventurous theme and cascading reels, and Playtech's Age of the Gods, which combines mythology elements with numerous paylines and free spins.
Branded slots are inspired by movies, TV shows, music, and other well-known franchises. These games entertain fans with familiar characters, themes, and storylines. Our research shows that players often choose NetEnt's Narcos, based on the hit TV series, and Playtech's DC Justice League, featuring superheroes like Batman and Superman.
Many more options are available beyond the top five most popular slot types. These include themed slots, fruit machines, 3D slots, and Megaways slots, to mention a few. Such games appeal to players with different preferences, budgets, and gaming styles.
When choosing a slot, it's important to consider factors like RTP (return to player) rate, volatility, and themes. RTP indicates the potential payout over time, while volatility measures the risk level of the game. Themes add another layer of entertainment, allowing you to choose games that match your interests.
| Types of Slots | Description | Popular Slots | Read More! | |
|---|---|---|---|---|
| Seven-Reel Slots | Turbo-charged modern slots with more paylines. | BorgataRead More! | ||
| Nine-Reel Slots | Rare but exciting, with hundreds of paylines. | BetMGMRead More! | ||
| Video Slots | Immersive graphics and animations keep these slots entertaining. | Bet365Play Now! | ||
| 3D Slots | Featuring 3D graphics, these slots have the most appealing visuals. | Virgin CasinoPlay Now! | ||
| Fruit Machine Slots | With classic fruit symbols, they represent the digitalized version of traditional one-armed bandits. | PartyCasinoPlay Now! | ||
| Themed Slots | Themed online slots are based on specific subjects, like movies or history, featuring related graphics, sounds, and bonus features. | BetRiversPlay Now! | ||
| Megaways Slots | Megaways slots have 6 reels and up to 117,649 paylines, changing their number with each spin. | StardustPlay Now! | ||
| Penny Slots | Penny slots have minimum bets per spin starting from $0.01 and are perfect for low rollers. | Caesars Palace Online CasinoPlay Now! | ||
The choice of themes across the best online slots sites can be overwhelming, so if you don't know where to start, here's an idea. Some of the most appreciated storylines are adventurous, with Gonzo's Quest being the perfect example. Ancient cultures, such as Egyptian, Aztec, Greek, and Norse Mythology, are also popular.
Once you pick the best casino for online slots, you can start browsing for new games. Some platforms offer additional search filters, which help you categorize the games by title, type, or software.
The main difference between the two is the financial aspect. Playing slots at real money casinos requires wagering actual money and potentially winning cash prizes. Such games often feature jackpots, bonus rounds, and special symbols that add to the overall user experience.
On the other hand, social casinos offer free slots that you can play just for fun. These platforms use virtual currency instead of real money. Social slots are a great way for new players to understand the mechanics and rules without financial risk. Some real money casinos also offer demo play options, a great opportunity to test a game before spending money on it. To show you what it looks like, we included a free version of Mega Joker by NetEnt, which you can try below.
Slot payouts refer to the percentage of initial bets a slot machine returns to you over time, known as the RTP (return to player). Volatility, on the other hand, indicates a slot's risk level, determining how often and how much it pays out. In the broader context of casino game payouts, slots differ significantly. Table games like blackjack or roulette have relatively stable payouts and lower volatility.
Slots, however, vary widely in both payouts and volatility. High-volatility slots might pay out larger sums less frequently, while low-volatility slots offer smaller, more frequent wins. Good payouts for slots are above 96.00%, so keep that in mind when you want to try a new game. Even though that's an important factor, remember that outcomes are based on chance and play responsibly.
The return-to-player rate is the approximative percentage of wagered money a slot machine returns to you over the long run. It's calculated based on millions of spins. An important detail is that RTPs are set by the software provider, not the casino. Top providers like NetEnt, IGT, and Playtech are known for offering slots with some of the highest payouts, which we listed below.
| Online Slot | Play At | Payout Rate | Jackpot | Max Bet | Slot Rating | Secure Link | Terms |
|---|---|---|---|---|---|---|---|
| Monopoly Big Event | BetMGM | 🥇 99.00% | No | $500 | Visit Site | Valid only for new NJ players over 21 years of age. Opt-in required. Min. deposit $10. Full T&C's apply. | |
| Mega Joker | BetRivers | 🥈 99.00% | Yes | $10 | Visit Site | New players only. Min. $10 deposit to quality, CASINOBACK: Bonus money match of casino net losses in first 24 hours of play up to max. designated amount. 1X playthrough requirement on select games. Bonus money expires 30 days from Issuance it playthrough requirement unmet. Full T&Cs apply. | |
| Blood Suckers | PartyCasino | 🥉 98.00% | No | $50 | Visit Site | Valid only for new NJ players over 21 years of age. Full T&Cs apply. | |
| Starmania | Borgata | 🏅 97.87% | No | $250 | Visit Site | Valid only for new NJ players over 21 years of age. Full T&Cs apply. | |
| White Rabbit Megaways | DraftKings | 🏅 97.77% | No | $50 | Visit Site | Valid for new customers. Must choose 1 offer and opt-in within 7 days (168 hours) of registering a new account. Must deposit min. $5 within 7 days (168 hours) of opting in to earn (a) a 100% deposit match up to $2,000 in Casino Bonus Funds or (b) a 100% deposit match up to $100 Casino Credits. Full T&Cs apply. |
RTPs indicate the potential returns over time, helping you pick games with better odds. However, although an important factor, you should rely on more than just the payout rate for choosing. A good strategy is to consider the volatility and match it to your playing style. Features like free spins, multipliers, and scatters could also increase your winning chances. Experienced players know that games with such mechanics are available at the highest payout online casinos, with RTPs over 97.00%.
Payout volatility refers to the risk level associated with a slot machine's payouts. Low-volatility slots pay out smaller, more frequent wins, while medium-volatility slots offer a balance between frequent payouts and the chance for larger wins. High-volatility slots, on the other hand, provide the potential for bigger wins but with less frequency, appealing to players who enjoy higher risks.
Bonuses are important for players, so we take the time to evaluate terms and conditions before recommending them. We've found several new customer promotions offering extra cash and free spins, which you can use to play your favorite games. Below, you'll find the offers at the best slot sites, featuring generous deposit matches and competitive wagering requirements.
| Casino Site | Bonus | Free Spins | Wagering | Slots Contribution | Eligible States | Secure Link | |
|---|---|---|---|---|---|---|---|
| DraftKings | Play $5, get $50 In Casino Credits | Not Needed | 15x | 100% | MI, PA, WV, NJ | Claim Your Bonus | Valid for new customers. Must choose 1 offer and opt-in within 7 days (168 hours) of registering a new account. Must deposit min. $5 within 7 days (168 hours) of opting in to earn (a) a 100% deposit match up to $2,000 in Casino Bonus Funds or (b) a 100% deposit match up to $100 Casino Credits. Full T&Cs apply. |
| BetMGM | 100% up to $1,000 + $25 On the House | Not Needed | 15x | 100% | MI, PA, WV, NJ | Claim Your Bonus | Valid only for new NJ players over 21 years of age. Opt-in required. Min. deposit $10. Full T&C's apply. |
| bet365 | 100% up to $1,000 New Player Bonus | Not Needed | 20x | 100% | NJ | Claim Your Bonus | Valid only for new NJ players over 21 years of age. Opt-in required. Min. deposit of $10. Full T&Cs apply. |
We've signed up for all these bonuses by making the minimum required deposit and playing a few spins. We were able to withdraw small winnings, confirming that these websites have trustworthy payouts. Keep in mind that the best casino bonuses count slots as 100% toward meeting wagering requirements, which is standard in the industry. You may also find promotions with free spins that apply only to specific games, so reading the terms and conditions is crucial.
Mobile gaming started as a trend but is definitely here to stay. Since we also like to play on the go, we tested all recommended platforms on iOS and Android. Two of the top-rated online slots sites stood out with a rating of 4.8/5 on the App Store and excellent customer feedback. We appreciated their fast loading times and easy navigation, which is why we've listed them below.
| US Slots Apps | Rating | Slots Bonus | Mobile Slots | Compatibility | Eligible States | Secure Link | Terms |
|---|---|---|---|---|---|---|---|
| BetMGM | 100% up to $1,000 + $25 On the House | 679 | iOs, Android | NJ, PA, MI, WV | Play Here! | Valid only for new NJ players over 21 years of age. Opt-in required. Min. deposit $10. Full T&C's apply. | |
| DraftKings | Play $5, get $50 In Casino Credits | 847 | iOs, Android | PA, MI, | Play Here! | Valid for new customers. Must choose 1 offer and opt-in within 7 days (168 hours) of registering a new account. Must deposit min. $5 within 7 days (168 hours) of opting in to earn (a) a 100% deposit match up to $2,000 in Casino Bonus Funds or (b) a 100% deposit match up to $100 Casino Credits. Full T&Cs apply. |
These platforms are compatible with all operating systems and feature a user-friendly interface with search bars and filters to sort games by type. You can download the recommended casino apps or play directly from your browser. If you choose the browser option, you might still need to download a geolocation app. Updating your OS can also improve the overall performance.
Before you deposit, double-check that the platform is legal. Our expert researchers found many available payment methods at the best online slots sites, such as debit cards and e-wallets. We prefer online casinos that accept Mastercard because all deposits are safe and processed instantly.
Another popular choice is playing at PayPal casinos, as this payment method doesn't require sharing your banking data with third parties. Prepaid cards and traditional online banking are also available, while bank wire transfers are ideal for larger deposits. Our team also suggest avoiding cryptocurrency, as legal online casinos don't offer this method, so it's a red flag if you see a site that does.
While deposits are possible with various payment methods, some options, like PayNearMe and Paysafecard, are unavailable for withdrawals. If you deposit with prepaid cards, you'll need to choose a different cashout option, such as e-wallets.
PayPal and Venmo provide the fastest casino payouts, with transfers typically taking up to 3 business days. To speed up the process, verify your account with customer support by providing a copy of your ID or other proof of identity.
Always check if your preferred online casino is licensed. To legally offer online slot machines, all sites need a valid license for the states where they operate. You should easily find a casino's permit displayed on its website. If they don't have information about licensing, we highly recommend that you avoid these sites. The current state regulators in the US are:
All platforms we recommend have the required licenses, and you can always consult the regulator's site, which shows the full list of registered online casinos. The best slot sites comply with local gambling regulations, providing responsible gambling tools and secure payments. Their websites and apps use data encryption to protect your personal and financial data, while the state authorities regularly audit games.
Playing online slots is straightforward and fun. To get started, choose the best casino for online slots and open an account. Then, select a game, set your bet amount, and hit the spin button. The goal is to match symbols, usually at least three, across the reels and paylines to win prizes. Reels are the vertical columns that spin, and paylines are the lines that determine winning combinations.
The number of paylines varies from one to hundreds. The more paylines, the better the chances for landing matching symbols. Some games also have bonus features like free spins, multipliers, wild symbols, and mini-games, providing additional ways to win and keep you entertained.
Online slots use a random number generator (RNG) to guarantee fair results. Many casinos offer free demos, allowing you to try games before spending any money. We recommend that new users read a few of our slot reviews to find the right match for them.
Online slots come with various themes and elements, each representing different values. Basic symbols typically offer lower payouts, while higher-value symbols or special characters provide bigger rewards when they form winning combinations. You can always find information about matches, payouts, and features in the game rules.
Players often seek games with more than just standard reels. Special symbols like wilds can substitute for others to complete winning combinations. Scatters trigger bonus features like free spins or special mini-games, regardless of their position on the reels. Multipliers increase the payout of any winning combination they are part of, making them highly valued.
It will substitute for most symbols – bar scatters – to complete winning combinations on the reels.
Land three scatter symbols anywhere – not only on a payline – to trigger a cash prize or bonus feature.
They multiply a win by a set amount - a 2x wild, for example, doubles your payout. A multiplier can go up to 15x, which is very satisfying.
The best online slots also feature unique symbols with special functions. These can include expanding wilds that cover entire reels or sticky symbols that stay in place for several spins. Such features, combined with a good RTP rate, don’t guarantee a win but can increase your chances of landing winning combinations.
We chose this platform as the best casino for online slots for several reasons. With over 684 options, you can select from dozens of exclusive games, including in-house developed products like MGM Grand Millions and BetMGM Gold. An important highlight is their branded slots featuring player favorites like The Godfather and Jumanji. Plus, the welcome bonus applies to all available slot games, making it our top choice.
When speaking of gambling tech, Jane is our specialist. She's our slots expert, and with her B.S. in Engineering, you can rely on her to explain complicated game mechanics. Keeping up with casino trends, she'll update you on the latest games and innovative features.
More about Jane