Short answer — only a small number of U.S. jurisdictions currently allow state‑regulated online casino (iCasino) play. As of my check today (September 30, 2025), the primary states with fully regulated online casino sportsbooks/gaming (real‑money slots, table games and/or online poker) are:

• New Jersey. Licensed real‑money online casinos have operated here since 2013 and offer a wide selection of operators. (GlobeNewswire.com)
• Pennsylvania. A large regulated iGaming market (slots, table games, poker). (GlobeNewswire.com)
• Michigan. Robust online casino market with many licensed operators. (GlobeNewswire.com)
• Connecticut. Legal via compacts/agreements with tribal operators (Mohegan/Foxwoods partnerships). (Gambling360.com)
• Delaware. One of the earliest states to legalize online casino/poker (state lottery oversight). (Gambling360.com)
• West Virginia. State allows online casino games under its regulations. (Gambling360.com)
• Rhode Island. Recently added to the list of regulated iCasino states (regulatory rollout in 2024–2025). (jackpotbetonline.com)

Notes and important caveats

• “Online casino” vs “online poker” vs “online sports betting”: Some jurisdictions allow only limited online gambling (for example, Nevada allows licensed online poker but has historically been more restrictive on slots/table games). Other states may have mobile sports betting but not iCasino. Check the exact game types permitted in each state. (Gambling360.com)
• Access is location‑restricted: licensed iCasino sites/apps only work when you are physically inside the approving state’s borders (geolocation checks). (GlobeNewswire.com)
• Laws change frequently: several other states have active bills, tribal compacts, or proposals and could legalize iCasino play soon. Because this area is evolving, always confirm with the state gaming regulator or the state’s official gambling/lottery website before signing up or depositing. The AP and industry trackers note new legislative activity and model legislation being discussed in 2024–2025. (apnews.com)

If you want, I can:

• Give a concise state‑by‑state table (50 states) showing whether each allows iCasino, online poker only, mobile sports betting, or none (with citations), or
• Look up the official regulator site for any one state listed above and link to the regulator’s licensing page for confirmation.