For residents of Oklahoma looking for 18+ casinos, you are very fortunate, unlike many US States. By far the majority of casinos accept 18+ into the gaming area with only a handful raising to 21+ due to alcohol being served on premise or the casino itself has chosen to raise the age limit.
Oklahoma state gambling laws permit 18+ players at land based casinos. In addition there are online options that have a minimum age of 18+.
Here is a list of casinos in Oklahoma and their minimum gambling age.
| Casino | Address | Legal Age |
| Ada Gaming Center | 1500 N Country Club Rd, Ada, OK 74820 | 18+ |
| Apache Casino Hotel | 2315 E Gore Blvd, Lawton, OK 73501 | 18+ |
| Black Gold Casino | 288 Mulberry Ln, Wilson, OK 73463 | 18+ |
| Border Casino | 22953 Brown Springs Rd, Thackerville, OK 73459 | 18+ |
| Bordertown Casino | 129 Oneida St, Wyandotte, OK 74370 | 18+ |
| Buffalo Run | 1000 Buffalo Run Blvd, Miami, OK 74354 | 18+ |
| Casino Oklahoma | 220 E Cummins St, Hinton, OK 73047 | 18+ |
| Cherokee Casino Grove | 24979 US-59, Grove, OK 74344 | 18+ |
| Cherokee Will Rogers Downs | 20900 S 4200 Rd, Claremore, OK 74019 | 18+ |
| Cherokee Ramona | 31501 US-75, Ramona, OK 74061 | 18+ |
| Cherokee Roland | 109 Cherokee Blvd, Roland, OK 74954 | 18+ |
| Cherokee Sallisaw | 1621 W Ruth Ave, Sallisaw, OK 74955 | 18+ |
| Cherokee South Coffeyville | 1506 US-169, South Coffeyville, OK 74072 | 18+ |
| Cherokee Tahlequah | 3307 Seven Clans Ave, Tahlequah, OK 74464 | 18+ |
| Cherokee West Siloam Springs | 2416 US-412, West Siloam Springs, OK 74338 | 18+ |
| Chickasaw Travel Stop | 201 Latta Rd, Ada, OK 74820 | 18+ |
| Chisholm Trail Casino | 7807 US-81, Duncan, OK 73533 | 18+ |
| Choctaw Broken Bow | 1790 S Park Dr, Broken Bow, OK 74728 | 18+ |
| Choctaw Durant | 4216 US-69, Durant, OK 74701 | 18+ |
| Choctaw Grant | 1516 US-271, Grant, OK 74738 | 18+ |
| Choctaw Idabel | 1425 SE Washington St, Idabel, OK 74745 | 18+ |
| Choctaw McAlester | 1638 S George Nigh Expy, McAlester, OK 74501 | 18+ |
| Choctaw Pocola | 3400 Choctaw Rd, Pocola, OK 74902 | 18+ |
| Choctaw Stringtown | 893 US-69, Stringtown, OK 74569 | 18+ |
| Cimarron Casino | 821 W Freeman Ave, Perkins, OK 74059 | 18+ |
| Comanche Nation Casino | 402 SE Interstate Dr, Lawton, OK 73501 | 18+ |
| Comanche Red River Casino | 196747 OK-36, Devol, OK 73531 | 18+ |
| Comanche Spur Casino | 9047 U.S. Highway 62, Elgin, OK 73538 | 18+ |
| Comanche Star Casino | 263171 Highway 53, Walters, OK 73572 | 18+ |
| Creek Nation Duck Creek | 10085 Ferguson Rd, Beggs, OK 74421 | 18+ |
| Creek Nation Bristow | 121 W Lincoln Ave, Bristow, OK 74010 | 18+ |
| Creek Nation Checotah | 830 N Broadway St, Checotah, OK 74426 | 18+ |
| Creek Nation Eufaula | 806 Forest Ave, Eufaula, OK 74432 | 18+ |
| Creek Nation Holdenville | 211 E Willow St, Holdenville, OK 74848 | 18+ |
| Creek Nation Muskogee | 3420 W Peak Blvd, Muskogee, OK 74401 | 18+ |
| Creek Nation Okemah | 1100 S Woody Guthrie St, Okemah, OK 74859 | 18+ |
| Downstream Casino Resort | 69300 E Nee Rd, Miami, OK 74363 | 18+ |
| FireLake Casino | 41207 Hardesty Rd, Shawnee, OK 74801 | 18+ |
| Gold Mountain | 1410 Sam Noble Pkwy, Ardmore, OK 73401 | 18+ |
| Gold River Casino | 31064 South Highway 281, Anadarko, OK 73005 | 18+ |
| Golden Mesa | 2469 Mile, 28th St, Guymon, OK 73942 | 18+ |
| Golden Pony Casino | 109095 Okemah St, Okemah, OK 74859 | 18+ |
| Goldsby Casino & Gaming Center | 1038 W Sycamore Rd, Oklahoma City, OK 73072 | 18+ |
| Grand Casino Shawnee | 777 Grand Casino Blvd, Shawnee, OK 74804 | 18+ |
| Grand Lake | 24701 S 655 Rd, Grove, OK 74344 | 18+ |
| Hard Rock Casino Tulsa | 777 W Cherokee St, Tulsa, OK 74015 | 18+ |
| High Winds Casino | 61475 E 100 Rd, Miami, OK 74354 | 18+ |
| Indigo Sky Casino | 70220 US-60, Wyandotte, OK 74370 | 18+ |
| Ioway Casino | 338445 E. Highway 66, Chandler, OK 74834 | 18+ |
| Jet Stream Casino | 2001 W Airline Rd, Pauls Valley, OK 73075 | 18+ |
| Kickapoo Casino Harrah | 25230 US-62, Harrah, OK 73045 | 18+ |
| Kickapoo Casino Shawnee | 38900 W MacArthur St, Shawnee, OK 74804 | 18+ |
| Kiowa Casino Carnegie | 514 OK-9, Carnegie, OK 73015 | 21+ |
| Kiowa Casino Red River Devol | 198131 OK-36, Devol, OK 73531 | 21+ |
| Kiowa Casino Verden | 33165 County Street 2740, Verden, OK 73092 | 18+ |
| Lucky Star Canton | 301 NW North Canton Avenue, Canton, OK 73724 | 18+ |
| Lucky Star Clinton | 10347 N 2274 Rd, Clinton, OK 73601 | 18+ |
| Lucky Star El Reno | 7777 US-81, Oklahoma City, OK 73036 | 18+ |
| Lucky Star Hammon | 20413 OK-33, Hammon, OK 73650 | 18+ |
| Lucky Star Watonga | 1407 S Clarence Nash Blvd, Watonga, OK 73772 | 18+ |
| Lucky Turtle Casino | 64499 US-60, Wyandotte, OK 74370 | 18+ |
| Madill Gaming Center | 902 S 1st St, Madill, OK 73446 | 18+ |
| Muscogee Travel Plaza | 3950 N 32nd St, Muskogee, OK 74401 | 18+ |
| Native Lights Casino | 12375 US-77, Newkirk, OK 74647 | 18+ |
| Newcastle Casino | 2457 Highway 62 Service Rd, Oklahoma City, OK 73065 | 18+ |
| One Fire Casino | 1901 N Wood Dr, Okmulgee, OK 74447 | 18+ |
| Osage Casino Bartlesville | 222 Allen Rd, Bartlesville, OK 74003 | 18+ |
| Osage Casino Hominy | 39 Deer Ave, Hominy, OK 74035 | 18+ |
| Osage Casino Pawhuska | 2017 E. 15th St &, OK-99, Pawhuska, 74056 | 18+ |
| Osage Casino Ponca | 64464 State Highway 60, Ponca City, OK 74604 | 18+ |
| Osage Casino Sand Springs | 301 Blackjack, Tulsa, OK 74063 | 18+ |
| Osage Casino Skiatook | 5591 W C Rogers Blvd, Tulsa, OK 74070 | 18+ |
| Osage Casino Tulsa | 951 West 36th St N, Tulsa, OK 74127 | 18+ |
| The Outpost Casino | 69701 E 100 Rd, Wyandotte, OK 74370 | 18+ |
| Prairie Moon Casino | 202 S Eight Tribe Trail, Miami, OK 74354 | 18+ |
| Prairie Sun Casino | 3411 P St NW, Miami, OK 74354 | 18+ |
| Quapaw Casino | 58100 E 64 Rd, Miami, OK 74354 | 18+ |
| River Bend Casino Hotel | 100 Jackpot Pl #2158, Wyandotte, OK 74370 | 18+ |
| River Spirit | 8330 Riverside Pkwy, Tulsa, OK 74137 | 18+ |
| Riverwind Casino Norman | 1544 OK-9, Oklahoma City, OK 73072 | 18+ |
| Sac & Fox Nation Stroud Casino | 356120 926 Rd, Stroud, 74079 | 18+ |
| SaltCreek Casino | 1600 US-81, Pocasset, 73079 | 18+ |
| Seminole Nation | 11267 Interstate 40, Seminole, 74868 | 18+ |
| Seven Clans Gasino Chilocco | 12901 US-77, Newkirk, OK 74647 | 18+ |
| Seven Clans Casino & Resort First Council | 12875 US-77, Newkirk, OK 74647 | 18+ |
| Seven Clans Paradise Casino | 7500 US-177, Red Rock, OK 74651 | 18+ |
| Seven Clans Perry Casino | 511 Kaw St, Perry, OK 73077 | 18+ |
| Seven Clans Gasino Red Rock | 8401 US-177, Red Rock, OK 74651 | 18+ |
| SouthWind Braman | 9601 US-177, Braman, OK 74632 | 18+ |
| SouthWind Newkirk | 5640 N La Cann Rd, Newkirk, OK 74647 | 18+ |
| SouthWind Kanza | 9601 US-177, Braman, OK 74632 | 18+ |
| StoneWolf Casino | 54251 S 34900 Rd, Pawnee, OK 74058 | 18+ |
| Sugar Creek Casino | 5304 N Broadway Ave, Hinton, OK 73047 | 18+ |
| Teepee Casino | 28314 East 6th Street, Yale, OK 74085 | 18+ |
| Texoma Casino | 1795 US-70, Kingston, OK 73439 | 18+ |
| The Artesian Casino & Hotel | 1001 W 1st St, Sulphur, OK 73086 | 18+ |
| The Black Hawk Casino | 42008 Westech Rd, Shawnee, OK 74804 | 18+ |
| The Riverstar Casino | 11801 E2160 Rd, Terral, OK 73569 | 18+ |
| The Stables Casino | 530 H St SE, Miami, OK 74354 | 18+ |
| Thunderbird Casino Shawnee | 2051 S Gordon Cooper Dr, Shawnee, OK 74801 | 18+ |
| Thunderbird Casino Norman | 15700 OK-9, Oklahoma City, OK 73026 | 18+ |
| Tonkawa Hotel & Casino | 16601 W South Ave, Tonkawa, OK 74653 | 18+ |
| Tonkawa Gasino | 10700 Allen Dr, Tonkawa, OK 74653 | 18+ |
| Trading Post Casino Pawnee | 291 Agency Rd, Pawnee, OK 74058 | 18+ |
| Treasure Valley Casino Davis | 12252 Ruppe Rd, Davis, OK 73030 | 18+ |
| Washita Casino | 30639 HWY 145, Paoli, OK 73074 | 18+ |
| Wewoka Trading Post | 36625 US-270, Wewoka, OK 74884 | 18+ |
| WinStar World Casino & Resort | 777 Casino Ave, Thackerville, OK 73459 | 18+ |