How Sports Betting Legalization Unfolded State by State: The Betzonic Perspective
The legalization of sports betting in the United States represents one of the most significant regulatory shifts in American gambling history. What began as a tightly controlled prohibition enforced by federal law has, over the course of roughly a decade, transformed into a fragmented but rapidly expanding legal marketplace spanning dozens of states. Understanding how this transformation unfolded requires examining the legal foundations that were dismantled, the political calculations that drove individual states to act, and the commercial infrastructure that emerged almost immediately once the barriers came down. The story is neither uniform nor simple — each state brought its own timeline, its own regulatory philosophy, and its own set of stakeholders to the table.
The Federal Framework and the Collapse of PASPA
For over two decades, the Professional and Amateur Sports Protection Act of 1992 — commonly known as PASPA — served as the federal mechanism that effectively banned sports betting across most of the United States. The law did not technically criminalize sports wagering outright; instead, it prohibited states from authorizing or licensing it, which achieved the same practical result. Only four states were grandfathered under PASPA at the time of its passage: Nevada, Delaware, Montana, and Oregon, each of which had some form of sports lottery or wagering already in operation. Nevada remained the only state where single-game sports betting was fully legal.
The challenge to PASPA originated in New Jersey, a state that had watched Atlantic City's casino revenues erode steadily through the 2000s. New Jersey voters approved a constitutional amendment in 2011 authorizing the state legislature to legalize sports betting, and the legislature subsequently passed enabling legislation. The major professional sports leagues — the NFL, NBA, MLB, NHL — along with the NCAA filed suit almost immediately, arguing that New Jersey's law violated PASPA. The litigation wound through the federal courts for years, with New Jersey losing at the district and appellate levels before the Supreme Court agreed to hear the case, now styled Murphy v. National Collegiate Athletic Association.
On May 14, 2018, the Supreme Court issued its ruling in Murphy v. NCAA, striking down PASPA in a 6-3 decision authored by Justice Samuel Alito. The Court held that PASPA violated the anticommandeering doctrine of the Tenth Amendment by effectively forcing states to maintain laws that prohibited sports gambling — a form of federal commandeering of state legislative processes. The ruling did not legalize sports betting nationally; it simply removed the federal prohibition and returned the question to individual states. What followed was a legislative rush that few had fully anticipated in its speed and breadth.
The First Wave: States That Moved Immediately
New Jersey had spent years preparing for the possibility of a favorable Supreme Court ruling, and it launched legal sports betting operations within weeks of the Murphy decision. Delaware, already grandfathered under PASPA for parlay betting, expanded to single-game wagering almost immediately as well, becoming technically the first state to offer full-scale legal sports betting after the ruling. Mississippi and West Virginia passed legislation in 2018, with retail sportsbooks opening at casinos before the year was out. Pennsylvania had actually passed its enabling legislation in October 2017, anticipating the Supreme Court's eventual ruling, and launched its first retail operations by late 2018.
Rhode Island launched in November 2018, followed by Arkansas and New York — though New York's initial authorization was limited to four upstate commercial casinos and did not include mobile wagering, a restriction that would frustrate the state's potential for years. Nevada, of course, had been operating legally all along and simply continued under its existing framework, though operators there watched the expanding national market with considerable interest.
The common thread in these early-adopting states was a combination of pre-existing casino infrastructure, budget pressures that made tax revenue attractive, and legislative groundwork that had been laid during the years of PASPA litigation. States with tribal gaming compacts faced additional complexity, as the relationship between state law and tribal exclusivity agreements had to be carefully negotiated — a dynamic that would slow or complicate legalization in states like California and Florida for years to come.
The Regulatory Models That Emerged
As more states entered the market through 2019, 2020, and into the early 2020s, distinct regulatory models began to crystallize. The most commercially significant distinction was between states that permitted mobile and online sports betting and those that restricted wagering to physical retail locations. This distinction proved enormously consequential: states with mobile access generated dramatically higher handle volumes than those without it. New Jersey's mobile-first market, anchored by operators like DraftKings, FanDuel, and BetMGM, regularly generated monthly handles exceeding $1 billion by 2021, making it one of the largest sports betting markets in the country despite its relatively small population.
The tax rate structures adopted by states varied widely and reflected differing philosophies about the purpose of legalization. Illinois imposed a 15 percent tax on adjusted gross revenue, while New Hampshire auctioned an exclusive contract to DraftKings and imposed a 51 percent tax rate — among the highest in the country. Pennsylvania settled on a 36 percent tax rate for online sports betting, which operators frequently cited as a constraint on promotional spending and market development. The tension between maximizing state tax revenue and creating conditions for a competitive, consumer-friendly market has been a persistent theme in state-level policy debates.
Operator licensing structures also diverged significantly. Some states, like New Jersey, adopted a relatively open model that allowed multiple online skins to operate through casino partners, resulting in a competitive marketplace with dozens of available platforms. Others, particularly those with strong tribal gaming interests, limited the number of licenses available or required mobile operators to partner with existing brick-and-mortar facilities. This tethering requirement — common in states like Iowa and Indiana — shaped which operators entered those markets and on what terms. Resources like the Betzonic site have documented how these structural differences affect the products and promotions available to bettors in different states, reflecting the genuine complexity of navigating a market that operates under fifty different regulatory regimes.
The question of what sports and bet types to permit also generated meaningful variation. Some states initially prohibited in-game or live betting, while others embraced it from the outset. College sports presented a particular flashpoint: several states, including New Jersey initially and later Louisiana, restricted or prohibited wagering on in-state college teams or college sports altogether, reflecting the influence of university systems in the legislative process. These restrictions were often loosened over time as states observed that neighboring jurisdictions without such rules captured cross-border handle.
The Later Wave and the States Still Holding Out
By 2021 and 2022, the pace of legalization had accelerated considerably. Michigan launched a robust online market in January 2021 and quickly became one of the top five states by handle. Arizona legalized in April 2021 and launched in September of that year, with a notably competitive licensing structure that allowed professional sports teams and tribal operators to apply directly for online licenses — a model that attracted nearly every major operator to the market within months. Louisiana voters approved sports betting in a parish-by-parish referendum in November 2020, with retail operations launching in 2021 and online wagering going live in January 2022. New York finally authorized mobile sports betting in its state budget legislation in April 2021, launching in January 2022 with a consortium model and a 51 percent tax rate that nonetheless generated record-breaking handle figures — over $1.6 billion in its first month alone — demonstrating the pent-up demand in the nation's most populous media market.
Maryland, Ohio, Massachusetts, and Kentucky followed in subsequent years, each with its own timeline and regulatory structure. Ohio launched on January 1, 2023, with a competitive multi-operator model that attracted substantial investment and marketing activity. Massachusetts launched retail in January 2023 and mobile in March of that year, with the state gaming commission conducting one of the more deliberate and publicly scrutinized licensing processes in the country. Kentucky, despite being a state with deep horse racing traditions, only legalized sports betting in 2023 after years of failed legislative attempts.
As of mid-2024, roughly 38 states plus the District of Columbia have legalized sports betting in some form, though the scope of what is permitted varies considerably. Several large states remain without legal sports betting despite years of legislative activity. California, the largest consumer market in the country, has seen multiple ballot initiatives fail — most recently in November 2022, when both a tribal-backed initiative and a cardroom-backed measure were defeated by wide margins, largely due to the record-breaking spending on competing campaigns that confused voters. Texas has seen repeated legislative sessions end without action, constrained by a political environment skeptical of gambling expansion and by the competing interests of tribal operators and commercial casino interests. Florida's situation is particularly complex: a 2021 compact between the state and the Seminole Tribe authorized mobile sports betting, but litigation over whether the compact violated federal law kept the market in legal limbo for years.
The holdout states represent not simply political inertia but genuine structural obstacles — constitutional requirements for voter approval of gambling expansions, powerful tribal gaming interests with exclusivity rights, and legislative chambers where gambling bills face procedural hurdles that have little to do with the underlying policy merits. The eventual resolution of these markets, particularly California and Texas, will reshape the national sports betting landscape in ways that are difficult to fully anticipate.
The state-by-state legalization of sports betting in the United States is, in many respects, an ongoing experiment in regulatory federalism. The absence of a uniform national framework has produced a market that is simultaneously dynamic and inefficient — dynamic because competition among states has driven innovation in product offerings, technology, and consumer protections, but inefficient because operators must navigate dozens of separate licensing regimes, tax structures, and compliance requirements. What is clear is that the genie is out of the bottle: the revenue figures, the operator investment, and the cultural normalization of sports wagering make a return to the pre-Murphy status quo essentially inconceivable. The remaining question is not whether sports betting will continue to expand, but how the states still on the sidelines will eventually structure their entry into a market that has already matured considerably around them.
