The law came first, and the architecture is downstream of it. Mississippi legalised dockside gaming in 1990, and the statute carried one condition that shaped this whole shoreline: the casino itself had to float. Operators answered by mooring barges in the Mississippi Sound and along the Back Bay, then building the hotel, the restaurants and the car park on dry ground behind them. The Isle of Capri opened on 1 August 1992 as the first casino in the state, on the Biloxi beachfront, and the same building trades today under the Golden Nugget name.
On 29 August 2005 the condition turned out to be the flaw. A barge is a floating structure, and Katrina's surge floated them. The Grand Casino's barge was carried off the shoreline and driven nearly five hundred feet inland, across all four lanes of Beach Boulevard. Within weeks the legislature changed the rule and permitted coastal casinos to be rebuilt on land, provided they sat within eight hundred feet of the shoreline. That single measurement is why the beach road looks the way it does. Nearly everything on it is a land-based resort put up after 2006, which is also why a coast with three centuries of history presents a visitor with a skyline that is younger than most of the cars parked under it.
Eight casino resorts operate inside the Biloxi city limits: Beau Rivage, Hard Rock, Golden Nugget, Harrah's Gulf Coast, IP, Palace, Treasure Bay and Boomtown. Three more get filed under "Biloxi" by search engines and are not in this city at all. Island View is in Gulfport, Scarlet Pearl is in D'Iberville on the far side of the Back Bay, and Hollywood is forty minutes west at Bay St Louis. The distinction matters when you have booked a room on one side of a bridge and a dinner reservation on the other.
This page is not here to talk anyone onto a gaming floor. The floor is a twenty-one-and-over room where the arithmetic is published, understood and permanently in the house's favour, and the only sensible way to treat it is as an entertainment purchase with a price you decide in advance. What the resorts are genuinely good at is everything around it. They hold the coast's concert rooms, its late kitchens, its spas, its indoor pools and most of its parking, and a visitor who never puts a note in a machine can use all of it. What follows is how the properties are laid out, what the rules actually say, and where the money goes.