Just off the top of my head may miss a state or two...
Alabama - No casinos
Alaska - No casinos
Arkansas - No Casinos
Arizona - Native American
California - Commercial Card Rooms, Native American
Colorado - Commercial Casinos (limited stakes), Native American
Conneticut - Native American
Delaware - Commercial Casinos (in conjunction with lottery)
Florida - Commercial Card Rooms (racetracks), Commercial Cruises to nowhere, Native American
Georgia - Commercial Cruises to nowhere
Hawaii - Nothing
Illinois - Commercial Casinos (Dockside Riverboats)
Indiana - Commercial Casinos (Dockside Riverboats)
Iowa - Commercial Casinos (Dockside Riverboats, Pari Mutual Tracks with slots and in the fututre table games), Native American
Kansas - Native American
Louisana - Commercial Casinos (Land Based, Dockside, Legal Video Poker Parlors), Native American
Maryland - Charitable Gaming
Michigan - Commercial Casinos (Detroit), Native American
Mississippi - Commercial Casinos (Dockside), Native American
Missouri - Commercial Casinos (Riverboat and Dockside)
Montana - Poker and Keno (video and live)
Nebraska - Keno and Pari Mutual Tracks. Also Pending vote in November. 2 large land based casinos, slot parlours on major highways, legal slots in bars, keno parlours and racetracks.
Nevada - Commercial Casinos, Legal limited gambling (bar, restaurants, stores), Native American.
New Jersey - Commercial Casinos (Atlantic City)
New Mexico - Commercial Casinos (slots at racetracks), Native American
New York - Commercial Casinos (Video Lottery at tracks), Native American
North Carolina - Native American
North Dakota - Blackjack (bars and restaurants), Native American
Oklahoma - Native American (Class II type gaming)
Oregon - Social Card Games (Bars and Restaurants), Native American, Video Lottery
Pennsylvania - Commercial Casinos (slots at racetracks)
Rhode Island - ???
South Carolina - Cruises to nowhere
South Dakota - Commercial Casinos (Deadwood), Video Lottery parlours, Native American
Washington - Commercial Card Rooms and Mini Casinos, Video Pull Tabs, Native American
West Virginia - Commercial Casinos (slots at tracks)