For residents of Colorado looking for 18+ casinos, the options are limited. Colorado state gambling laws permit 21+ players at land based casinos, whilst there are online options that have a minimum age of 18+.
Here is a list of casinos in Colorado and their minimum gambling age.
| Casino Name | Address | Legal Minimum Age |
| Ameristar Black Hawk | 111 Richman St, Black Hawk, CO 80422 | 21+ |
| Bronco Billy’s Casino | 233 E Bennett Ave, Cripple Creek, CO 80813 | 21+ |
| Bull Durham Casino | 110 Main St, Black Hawk, CO 80422 | 21+ |
| Century Casino Central City | 102 Main St, Central City, CO 80427 | 21+ |
| Century Casino Cripple Creek | 200 Bennett Ave, Cripple Creek, CO 80813 | 21+ |
| Dostal Alley Casino | 116 Main St, Central City, CO 80427 | 21+ |
| Easy Street Casino | 120 Main St, Central City, CO 80427 | 21+ |
| Golden Gates Casino | 261 Main St, Black Hawk, CO 80422 | 21+ |
| Golden Gulch Casino | 321 Main St, Black Hawk, CO 80422 | 21+ |
| Isle Casino Hotel – Black Hawk | 401 Main St, Black Hawk, CO 80422 | 21+ |
| Lady Luck Casino – Black Hawk | 340 Main St, Black Hawk, CO 80422 | 21+ |
| Monarch Casino | 488 Main St, Black Hawk, CO 80422 | 21+ |
| Red Dolly Casino | 530 Gregory St, Black Hawk, CO 80422 | 21+ |
| Saratoga Casino – Black Hawk | 101 Main St, Black Hawk, CO 80422 | 21+ |
| Sasquatch Casino | 125 Gregory St, Black Hawk, CO 80422 | 21+ |
| Sky Ute Casino Resort | 14324 CO-172, Ignacio, CO 81137 | 21+ |
| The Gilpin Casino | 111 Main St, Black Hawk, CO 80422 | 21+ |
| The Lodge Casino | 240 Main St, Black Hawk, CO 80422 | 21+ |
| Ute Mountain Casino Hotel | 3 Weeminuche Dr, Towaoc, CO 81334 | 21+ |
| Wild Card Saloon | 120 Main St, Black Hawk, CO 80422 | 21+ |
| Z Casino – Black Hawk | 101 Gregory St, Black Hawk, CO 80422 | 21+ |