Here are well-regarded online casinos where U.S. players commonly play blackjack, plus quick notes on each and safety/legal tips. Availability, game variety, bonuses and whether a casino is state‑licensed (vs. offshore/crypto sites that accept U.S. players) vary — check the casino’s site for which U.S. states they serve before you sign up.

Top picks (mix of U.S.-licensed and long-standing offshore/crypto sites)

• BetMGM — Large selection of blackjack variants (live and RNG), strong mobile apps and branded promotions; operates legally in multiple U.S. states. (Bonus.com)
• DraftKings Casino — Big game library including many blackjack variants and live tables; known for a polished mobile experience. (scams.info)
• FanDuel Casino — Good selection of table games and live blackjack where the operator is licensed to operate in your state. (Casino.org)
• Caesars / Harrah’s (online) — Strong branded catalog, many blackjack options and linked rewards with land properties in states where Caesars is licensed. (Casino.org)
• BetRivers / Rush Street Interactive — Offers blackjack and table games; commonly available in several regulated states. (Casino.org)
• Ignition (offshore/crypto-friendly) — Popular with U.S. players for blackjack and high crypto/anonymous deposit convenience; not state‑licensed in regulated U.S. markets. (GlobeNewswire.com)
• BetOnline / Wild Casino / Bovada (offshore/crypto-friendly) — Large blackjack/ live-dealer selections and flexible crypto banking; many U.S. players use them though they are not licensed by U.S. state regulators. (ValueWalk.com)

How I chose these: reputable review sites and recurring editor picks identify them for blackjack strength (game count, live dealer options), reliability, and player feedback. See summaries and comparisons on specialist casino-review sites. (Casino.org)

Important safety & legality notes (must-read)

• State rules differ: only some sites are licensed to operate in specific U.S. states (e.g., Michigan, New Jersey, Pennsylvania, West Virginia, etc.). Always confirm the casino’s state availability on its site. (Bonus.com)
• Licensed vs offshore: U.S. state‑licensed operators (BetMGM, DraftKings, FanDuel, Caesars, BetRivers, etc.) are regulated and typically safer for payments/dispute resolution. Offshore/crypto sites (Ignition, BetOnline, Bovada/Wild/etc.) may accept U.S. players but operate outside state regulatory oversight — they have different risks and protections. (Casino.org)
• Check RTP/house edge and rules for the blackjack variant you’ll play — “blackjack” can be many different rule sets with meaningfully different house edges. Trusted review sites list game counts and often RTP info. (ValueWalk.com)
• Responsible gambling: set deposit/bet limits, and use self-exclusion tools if needed. News reports show gambling harms can be severe for some People. (People.com)

Practical tips before you sign up

• Verify the site shows licensing information (state gaming regulator or recognized international license) and modern SSL encryption. (Casino.org)
• Read bonus T&Cs carefully — many casinos limit how much bonus play counts toward blackjack because blackjack often contributes less to wagering requirements. (Bonus.com)
• Prefer sites with multiple withdrawal options and clear KYC/withdrawal policies (state‑licensed casinos usually have clearer processes). (Casino.org)

If you want, I can:

• Produce a short, state‑filtered list (tell me which U.S. state you’re in and I’ll show only operators licensed to accept players there), or
• Compare 3–4 specific casinos (game counts, live dealer options, typical blackjack rules, welcome bonus terms) side‑by‑side.

Which of those would you like next?