With the commercial online casino industry touching the $10.74 billion mark, experts are now confident that it will grow at a higher rate than ever in the coming years. This confidence comes from the fact that online casinos have made quick progress in very few years to capture the share of the overall market.
Only 7 states have legalized online casinos, but they still hold the 13.6% market share. These facts clearly show the potential this industry has. Among the states where it is legal, some dominate the market, and some are showing great promise. They are driving forward the online casino industry growth in a very impressive way.
1. Pennsylvania
In the US online casino market, the undisputed king is Pennsylvania. The Pennsylvania online casino market is well-established, growing at an outstanding pace and will continue to dominate the revenue figures in comparison to other states. After legalization in 2019, its large population and a strong gambling culture have given the growth new avenues.
Its revenue has consistently impressed the industry experts, and in terms of the future too, they hold high hopes for the state. With $3.46 billion annual revenue in 2025, it has breached the $300 million a month mark many times. With a tax rate of up to 54% on digital slots, the state benefits significantly.
2. Michigan
Michigan entered the online casino scene quite late, but it caught up fast, and today, it ranks number 2 in terms of revenue figures. The gap between the top state Pennsylvania and Michigan is narrowing down as the state generated $3.1 billion last year with almost 30% year-on-year growth. As a result, the state received $597.5 million in direct tax revenue. The state’s 15 licensed tribal gaming groups have played a key role in maximizing revenue generation.
3. New Jersey
Since 2013, New Jersey has worked steadily towards increasing its market share in the overall US online casino industry. With close ties to Atlantic City’s casino market, it aims to put New Jersey at the top in terms of revenue. It surely looks promising because the current revenue stands at $2.91 billion, which is a 22% growth over 2024. From this, the state raked in 581.9 million in taxes. With an increased tax rate, which is almost 20%, the state will continue to pull in more every year.
4. Connecticut
After the top 3, the revenue generated by the other states drops significantly. Within this tier, the top player is Connecticut. The state has a small population, but still, it managed $760 million in online casino revenue. It made an entry in the market late, in 2021, so it’s maturing, and with time, we might see high growth in the state. The revenue is still of high importance in terms of the contribution of different states to US economic growth.
5. West Virginia and Delaware
West Virginia and Delaware together make a very good upcoming online casino market in the US. With West Virginia pulling in $400 million and Delaware $50 million, they have shown that even small states will matter in the long-time success of the digital format of casinos. West Virginia clocked 58% year-over-year growth in 2025, so the future is certainly promising for the state’s market.
6. Nevada
The moment you hear Nevada, you expect the top gambling market figures from the state. But for online casinos, the story is different. To help the physical casino industry remain the main growth center because of a large, full-scale economic ecosystem around it, the state allows only online poker and mobile sports betting. Still, it managed somewhere between $30 million and $40 million in revenue last year in online poker (NGCB does not publish exact data) and $601.4 million in sports betting revenue.
Future expansion across the US
With only 7 states allowed to run online casinos, and from those, some with a small share because of low population and other ecosystem-related restrictions, there is still a lot that can be tapped into. For the online casino industry to become a major contributor to the US economy, it will require legalization and broader adoption of innovations related to the crypto market, AI-based personalization, and interstate player pooling.
