The 5 States Leaving Billions in Gambling Money on the Table

California could plausibly support a regulated online gambling market worth roughly $12 billion a year. That would bring in more than $1 billion in tax revenue for the state every year. But California doesn’t have a regulated online gambling market. Neither does Texas, at an estimated $9.5 billion. Between them, two of the country's largest states are sleeping on a regulated market that would rank among the biggest in America, and both have repeatedly declined to wake up and actually build one.

I took real 2025 revenue from states with mature regulated gambling markets, adjusted for population, and applied that rate to states missing the same products.

Building the Estimate

Four states anchor the model: New Jersey, Pennsylvania, Michigan, and Connecticut, all of which report full-year online casino and online sports betting revenue. In 2025, New Jersey generated $2.91 billion in iGaming revenue and $1.18 billion in sports betting revenue, a combined $4.09 billion. Pennsylvania posted roughly $2.93 billion in iGaming revenue and $867.8 million in sports betting, per the Pennsylvania Gaming Control Board. Michigan cleared $3.77 billion combined, and Connecticut posted $973.4 million.

Divide each figure by the state's estimated adult population, using 78% of total population as a standard adult-share estimate drawn from Census Bureau QuickFacts, and a pattern emerges. New Jersey generates about $552 per adult, Michigan $477, Pennsylvania $331, and Connecticut $339.

The four-state average comes to roughly $435 per adult. To avoid overstating potential demand in states without established online markets, we discounted that figure by about 10% and used a conservative benchmark of $390 per adult.

Multiply a state’s adult population by the benchmark, and you get a rough estimate of what a regulated market there could support. States missing both online casino and online sports betting get the full combined rate. Florida is the exception: it already has legal mobile sports betting through the Seminole Tribe's compact, so it only gets the lower, casino-only rate.

Methodology note: figures apply the roughly $390-400 combined per-adult benchmark (or the ~$300 casino-only rate for Florida) to each state's estimated adult population, derived from 2024 Census population estimates at a uniform 78% adult share. These are estimates based on a simple model and should not be taken as forecasts.

Florida's position says as much about the model as it does about Florida. Georgia and Minnesota have zero regulated online sports betting or online casino products at all, and yet Florida, despite already running legal mobile sports betting, still lands ahead of both simply because 18 million adults is a lot of adults.

Georgia's House rejected a sports betting constitutional amendment in March, with just 63 lawmakers voting for it, far short of the 120 votes required.

Texas hasn't passed anything either; its legislature adjourned in June 2025 without advancing a single gambling bill, and the next real shot isn't until 2027.

Minnesota (~$1.8 billion) narrowly grabs the final spot. Despite a population approaching six million, the state still has no regulated online sportsbook or casino market. Minnesota has gone further than many holdouts, targeting offshore gambling and sweepstakes operators while also passing a law aimed at prediction markets. Under our population-based model, that leaves roughly $1.8 billion in potential annual regulated online gambling revenue on the table.

South Carolina (~$1.7 billion) Alabama (~$1.6 billion) and Utah (~$1.1 billion) sit just outside the top five. Utah's case is the cleanest: the state constitution bans gambling outright. Hawaii, the other state with zero legal gambling, lands around $440 million, proof the model scales down sensibly as population shrinks.

Prohibition Doesn't Mean People Aren't Gambling

None of this money simply disappears. The American Gaming Association's own research puts illegal and unregulated gaming revenue at $53.9 billion nationally, costing states more than $15 billion in lost tax revenue every year. Offshore and bookie-run sports betting alone accounts for an estimated $84 billion in handle and roughly $5 billion in revenue, according to the same AGA analysis.

Sweepstakes casinos, which operate in a dual-currency model that sidesteps most state gambling statutes, remain available in Texas, Florida and Georgia even though none of those states regulate real-money online gambling. California is the outlier there too, having banned sweepstakes-style platforms outright starting January 1, 2026.

Prediction Markets Make the State Border Even Blurrier

Federally regulated prediction markets add a genuinely new wrinkle. Kalshi and Polymarket self-certify under Commodity Futures Trading Commission oversight rather than state gambling law, which means residents of Texas, California, Georgia, South Carolina, and Alabama can already trade contracts on the Super Bowl, the World Series, or a presidential race without their state ever legalizing a single sportsbook. If someone in Austin can trade on the Cowboys' playoff odds through a federally regulated exchange, how much is state-level prohibition actually preventing?

How Much Tax Revenue Could Be at Stake?

Revenue and tax revenue aren't the same thing, and the gap matters. At a conservative 10% tax rate, California's estimated $12 billion market would generate roughly $1.2 billion a year in state tax revenue; at 20%, that climbs to $2.4 billion. Georgia's proposed lottery-run model and South Carolina's stalled bill haven't settled on final tax rates, so scenario ranges are more honest than a single number here.

The Limits of This Model

This estimate is simple, while the states in question are anything but. So many factors are at play when a state considers legalizing betting. You have to consider licensing fees, number of available licenses, land-based tethers, tax models, and more. Plus, gambling demand doesn't travel evenly.

Tourism-heavy states, existing tribal casinos, neighboring-state access, and plain old market maturity all push real numbers up or down from a flat per-adult rate. Nevada's proximity effect alone probably suppresses Utah's true demand below what a population-only model would suggest, and Florida's tribal gaming footprint complicates its own online casino math in ways a simple benchmark can't capture. We're not claiming an econometric model here, just a transparent, defensible sense of scale.

States Can Ban Gambling, But Can They Ban Gambling Demand?

A state can decline to regulate online casinos or sportsbooks, and several of the country's largest states have done exactly that, repeatedly, for years. None of them can guarantee residents stop gambling because the law says so. Between offshore books, sweepstakes platforms, and now federally regulated prediction markets, the exits multiply faster than the bans can close them. If the model here is even directionally right, several of these states are looking at hundreds of millions to billions of dollars a year in regulated revenue that's simply landing somewhere else.