How US States Legalize Sports Betting: Ballot vs. Legislature

Since the Supreme Court struck down the federal ban on sports betting in 2018, each state has decided whether and how to legalize it. The paths vary widely, from legislative bills to ballot referendums to tribal compacts. This guide explains how states legalize sports betting, why the route matters, and what to watch in future legalization efforts.

Background: The 2018 Supreme Court Decision

In Murphy v. NCAA, decided in May 2018, the US Supreme Court ruled that the federal Professional and Amateur Sports Protection Act was unconstitutional. The decision returned the question of sports betting to the states. Since then, a majority of states have legalized some form of sports wagering, though the details differ by state.

Quick answer: States legalize sports betting through one of three main routes: a bill passed by the legislature and signed by the governor, a voter-approved ballot measure, or a tribal-state compact for tribal gaming. The route affects who can operate, how taxes are set, and how fast betting launches.

For a state-by-state overview, visit our US sports betting page.

Route 1: Legislative Action

Most states have legalized sports betting through legislation. A bill is introduced, debated in committees, passed by both chambers, and signed by the governor. This route is flexible, since lawmakers can write detailed rules covering licensing, tax rates, and consumer protection.

Advantages

• Detailed regulation. Legislators can define licensing categories, advertising rules, and responsible gambling requirements.
• Faster in some cases. Without the need for a statewide vote, bills can pass in a single session if there is political agreement.

Challenges

• Political disagreements. Disputes over tax rates, online versus retail betting, and operator access can stall bills for years.
• Lobbying pressure. Casinos, tribes, sports teams, and operators often have conflicting interests.

Route 2: Ballot Measures

In some states, the state constitution requires voter approval for expanding gambling. In those cases, lawmakers may place a measure on the ballot, or advocates may collect signatures for a citizen initiative. If voters approve the measure, the legislature and regulators then write the rules.

Advantages

• Public mandate. A majority vote signals voter support.
• Bypasses legislative gridlock. In states where lawmakers have been unable to agree, a ballot can break the stalemate.

Challenges

• Campaign costs. Ballot campaigns can be expensive, and competing interests may spend heavily.
• Rigid language. Constitutional amendments can lock in terms that are hard to change later.
• Timing. Measures appear only on election ballots, so the process can take longer.

Missouri voters, for example, approved a ballot measure in 2024 that opened the door to legal sports betting. Check official state sources for details on current launch status in any state.

Route 3: Tribal Compacts

In many states, tribes hold exclusive rights to certain forms of gaming under federal law. Expanding sports betting may require amending a compact with the state, approved by the Interior Department. Florida is one well-known example, where legal sports betting launched through an agreement with the Seminole Tribe.

Tribal compacts can create unique structures, such as hub-and-spoke models, where online bets are treated as placed at the tribal server location. The legal details can be complex, and challenges have occurred in the courts.

Key Decisions States Make

Online vs. Retail Betting

Some states permit sportsbooks only at casinos and racetracks, while others allow mobile apps statewide. Online access tends to drive much higher handle.

Tax Rates and Revenue Use

Tax rates vary widely, from single digits to more than 50 percent in some states. Higher taxes can reduce promotions and competition among operators. States also decide how revenue is used, such as education funding, problem gambling services, or general funds.

Operator Licensing

States choose how many licenses to issue and what fees to charge. Some cap the number of operators, while others allow an open market.

Integrity and Consumer Protection

Rules often cover prohibited bets, such as certain college prop wagers, along with age requirements, advertising limits, and self-exclusion programs.

Why the Path Matters for Bettors

The legalization route influences which sportsbooks are available, what promotions they can offer, and the types of bets allowed. For example, a state with high taxes may see fewer sign-up bonuses. To find operators near you, see our best sportsbook promos page and review options such as the DraftKings review and FanDuel review.

What to Watch in Future Legalization

• States still without legal betting. Several large states have debated legalization repeatedly, so watch for new bills and ballot proposals.
• Tax increases. Many states have considered raising rates to address budget needs.
• Prediction market disputes. Questions around event contracts could influence state strategies, as covered in our latest articles.
• iGaming expansion. Some states consider legalizing online casino games alongside sports betting.

A Quick Timeline of the Typical Legalization Process

While every state is different, the process often follows a familiar pattern. First, a bill or ballot proposal is introduced and studied. Second, lawmakers or voters approve the framework. Third, the state gaming regulator writes detailed rules, which can take months. Fourth, operators apply for licenses and undergo background checks, and finally the first sportsbooks launch, sometimes in stages starting with retail locations before mobile apps go live.

Delays are common at every step, so announced launch dates often move. For bettors, the practical lesson is to wait for official regulator approval and use only licensed operators once betting goes live.

How to Stay Informed

Track state legislature websites, local news, and gaming regulators for official updates. Industry outlets also cover bill progress in detail. For a broader look at gambling rules, our gambling guides explain the basics.

Frequently Asked Questions

Which states have legal sports betting?

A majority of US states and Washington, DC, have legalized some form of sports betting, but the list changes. Check your state's gaming regulator for current information.

Why do some states require a ballot vote?

State constitutions in some states require voter approval before gambling can expand. In those states, a ballot measure is required even if lawmakers support legalization.

Is online sports betting legal in every legal state?

No. Some states allow only in-person betting at licensed venues. Others allow statewide mobile wagering.

Can the federal government ban sports betting again?

Congress could pass new federal legislation, but such proposals have not advanced. For now, regulation remains largely at the state level.

Conclusion

The route a state takes to legalize sports betting shapes everything from tax rates to the number of sportsbooks available. Keep an eye on legislative calendars, ballot measures, and tribal negotiations to understand what could come next. Return to DeucesCracked for ongoing coverage, and learn more about DeucesCracked.