The Biggest Casinos in the US
The biggest casino in the US is WinStar World Casino in Thackerville, Oklahoma, a Chickasaw Nation property with close to 400,000 square feet of gaming floor right by the Texas state line. That single floor is larger than any casino in Las Vegas and larger than the famous Connecticut resorts that held the title before it. This page ranks the biggest casinos in the US by the size of their gaming floor, the actual playing area, and says where each one sits and who runs it.
- Largest
- WinStarabout 400,000 sq ft floor
- Measure
- Gaming floorsquare footage, not hotel or acreage
- Entries
- 9verified and dated May 2026
- Reviewed
- May 2026a snapshot, sizes shift
How this ranking is measured
This list ranks casinos by gaming floor square footage, meaning the playing area itself, the part of the building filled with slot machines, table games, and poker. It deliberately leaves out hotel towers, convention space, dining, parking, and total property acreage, because those swell a number without putting another seat on the floor. That distinction matters. Some casinos publish a whole complex figure that is far larger than their actual gaming floor, and a few well known names are missing here for exactly that reason: their floors are smaller than the headline they market.
Each figure comes from the casino’s own official site, the operating tribe, or reputable trade press, and each is dated May 2026. Sizes move with every expansion, so the ranking is a snapshot rather than a permanent order. The top three are clear and well separated. The middle of the list, the properties in the 200,000 to 245,000 square foot band, sit close enough together that small measurement differences can reorder them, so read that part as a tight group rather than a precise sequence.
The biggest casinos in the US, ranked
Largest gaming floor first. Each casino links to its own page where we have one, otherwise to its city or state map.
Verified Verified locations for the ranked casinos. The two Connecticut resorts sit close together and group into a cluster until you zoom in.
Ranked by gaming floor square footage, largest first. Figures are sourced and dated May 2026 and shift with expansions.
1. WinStar World Casino Thackerville, Oklahoma · about 400,000 sq ft
The WinStar World Casino in Thackerville is the largest casino in the US and the centerpiece of the Chickasaw Nation’s gaming operation. Its gaming floor runs close to 400,000 square feet, split into city themed plazas with thousands of electronic games, a large table game pit, and one of the biggest poker rooms in the country. It sits just north of the Red River on Interstate 35, which makes it the first stop in Oklahoma for the entire Dallas and Fort Worth market.
2. Mohegan Sun Uncasville, Connecticut · about 364,000 sq ft
Mohegan Sun, run by the Mohegan Tribe in southeastern Connecticut, holds about 364,000 square feet of gaming across its Casino of the Earth and Casino of the Sky. For years it traded the national title back and forth with its neighbor a few miles away, and it remains the second largest casino in the country by floor space, anchoring a full resort with a hotel, an arena, and a shopping concourse.
3. Foxwoods Resort Casino Mashantucket, Connecticut · about 344,000 sq ft
Foxwoods Resort Casino, owned by the Mashantucket Pequot Tribal Nation, spreads about 344,000 square feet of gaming across six connected casinos. It was the largest casino in the US for a long stretch before the Oklahoma and Connecticut floors expanded around it, and it is still one of the largest resort casinos in North America, with a famous bingo hall, an outlet mall, and a theme park on site.
4. Yaamava’ Resort & Casino Highland, California · about 290,000 sq ft
Yaamava’ Resort & Casino near San Bernardino is the largest casino in California and the biggest on the West Coast, with roughly 290,000 square feet of gaming floor. Run by the Yuhaaviatam of San Manuel Nation, the property reopened under the Yaamava’ name in 2021 after a major expansion that added two new gaming levels and the tribe’s first on site hotel.
5. Seminole Hard Rock Hotel & Casino Tampa Tampa, Florida · about 240,000 sq ft
The Seminole Tribe of Florida’s Hard Rock casino in Tampa carries about 240,000 square feet of gaming floor and ranks among the highest grossing casinos in the country. It is in the middle of a large expansion that will push the floor and the resort larger still, so its figure here is a moving target that will need rechecking as the work finishes.
6. Choctaw Casino & Resort Durant Durant, Oklahoma · about 219,000 sq ft
The Choctaw Nation’s flagship in Durant holds about 219,000 square feet of gaming across casinos built in stages since 2006, topped by the 21 story Sky Tower added in 2021. Like WinStar an hour to the west, it draws heavily on north Texas, and the two Oklahoma giants sit within a short drive of each other near the state line.
7. Encore Boston Harbor Everett, Massachusetts · about 210,000 sq ft
Encore Boston Harbor is the largest commercial casino on this list, a Wynn Resorts property in Everett just outside Boston with about 210,000 square feet of gaming on two levels. Slots fill the main floor and a large table game and poker selection sits on the terrace above, making it the biggest casino floor in New England that is not run by a tribe.
8. Pechanga Resort Casino Temecula, California · about 200,000 sq ft
Pechanga Resort Casino in Temecula, run by the Pechanga Band of Indians, runs about 200,000 square feet of gaming, all of it non-smoking across the entire resort. It is the second largest casino in California behind Yaamava’ and one of the largest in the country, serving the San Diego, Orange County, and Inland Empire markets in southern California.
9. River Spirit Casino Resort Tulsa, Oklahoma · about 200,000 sq ft
River Spirit Casino Resort, operated by the Muscogee (Creek) Nation in Tulsa, rounds out the list with about 200,000 square feet of gaming along the Arkansas River. It anchors a riverside resort with a Margaritaville hotel and a concert venue, and it is one of several large tribal floors that make Oklahoma, not Nevada, the densest state for big casinos.
Why the biggest casinos are not in Las Vegas
The single biggest floors are not on the Las Vegas Strip, which surprises most people. Las Vegas grew as a dense row of resorts competing side by side, so its model is many large casinos packed together rather than one record breaking floor. The largest single floor in the city, at the MGM Grand, runs around 171,500 square feet, which is real scale but still short of every property in this top tier. The record holders are instead tribal resorts that serve a whole region from one site, in Oklahoma, Connecticut, and California, where a single destination has room to spread out and a strong reason to build the biggest floor for a wide market.
Most of the giants are tribal
Eight of the nine casinos here are run by Native nations, and only Encore Boston Harbor is a commercial property. That is not a coincidence. Tribal gaming under federal law let nations build large single site destinations to serve entire regions, often the only full scale casino for a wide radius, which rewards going big. The Chickasaw, Mohegan, Mashantucket Pequot, Yuhaaviatam of San Manuel, Seminole, Choctaw, Pechanga, and Muscogee (Creek) nations each built a flagship on that logic. The commercial casino markets, led by Las Vegas and Atlantic City, spread their gaming across many competing floors instead, which is why their individual properties land lower on a size ranking even where the cities themselves are far larger gambling markets.
Biggest casino questions
Q. What is the biggest casino in the US?
WinStar World Casino in Thackerville, Oklahoma, run by the Chickasaw Nation, with close to 400,000 square feet of gaming floor by the Texas state line. It passed the big Connecticut resorts after its expansions and now holds the title by a clear margin. Sizes shift with expansions, so this is a May 2026 snapshot.
Q. What is the largest casino in the world?
WinStar markets itself as the world's largest casino, and by total gaming floor it sits at or near the top globally. Its main rival is The Venetian Macao in Macau, China, at roughly 546,000 square feet, often called the largest single continuous casino floor in the world. Published figures vary by how each property counts its space, so treat any single world ranking as approximate.
Q. Why isn't a Las Vegas casino the biggest?
Las Vegas floors are large but not the largest. Even the biggest single floor on the Strip, the MGM Grand at about 171,500 square feet, would not crack this national top tier. Las Vegas packs many casinos close together rather than building one enormous floor, so the record holders are tribal resorts in Oklahoma, Connecticut, and California instead.
Q. What is the biggest casino in Connecticut?
Mohegan Sun in Uncasville, at about 364,000 square feet, edges out Foxwoods in Mashantucket, at about 344,000 square feet. They are the two largest casinos in the US outside Oklahoma, sitting about fifteen minutes apart in southeastern Connecticut.
Q. What is the biggest casino in California?
Yaamava' Resort & Casino in Highland, run by the Yuhaaviatam of San Manuel Nation, at about 290,000 square feet of gaming floor. Pechanga Resort Casino in Temecula is next at about 200,000 square feet. Both rank among the largest casinos in the country.
Q. How are the casinos on this list ranked?
By gaming floor square footage, the actual playing area with slots and tables, not hotel size, machine counts, or total property acreage. Each figure is taken from the casino's official site, the operating tribe, or reputable trade press, and dated May 2026. The ranking is a snapshot, since several properties are expanding.
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Editorial note
Reviewed by the CasinosMap editorial desk. Every gaming floor figure was checked against the casino's own official site, the operating tribe, or reputable trade press, not prior knowledge, and dated May 2026. The list counts gaming floor square footage only, never hotel size, machine counts, or total property acreage. Where a property publishes a whole-complex figure, only the gaming floor portion was used, which is why some well known casinos do not appear. Figures in the 200,000 to 245,000 square foot band sit close together, so the order within it is approximate, and the ranking is treated as a snapshot because several properties are expanding.
Sources
- WinStar World Casino official site, gaming floor size and game counts
- Mohegan Sun official FAQ, gaming floor square footage
- Foxwoods Resort Casino Mashantucket Pequot Tribal Nation property, gaming space across six casinos
- Yaamava' Resort & Casino Yuhaaviatam of San Manuel Nation, casino floor size
- Choctaw Casinos & Resorts Choctaw Nation, Durant gaming floor figures
- Encore Boston Harbor Wynn Resorts property, gaming floor size
- Pechanga and River Spirit official sites gaming floor figures for the Temecula and Tulsa resorts