| Hogshead Brewery | 4460 W 29th Ave | Denver | Colorado | 80212-3015 | United States | micro | |
| Holidaily Brewing Co | 801 Brickyard Cir Ste B | Golden | Colorado | 80403-8026 | United States | micro | |
| Holidaily Production Facility | | Golden | Colorado | 80403 | United States | planning | |
| Horse & Dragon Brewing Company | 124 Racquette Dr | Fort Collins | Colorado | 80524-2757 | United States | micro | |
| Horsefly Brewing Co | 846 E Main St | Montrose | Colorado | 81401-3938 | United States | brewpub | |
| IDK Beer Co | | Lakewood | Colorado | 80228-4251 | United States | planning | |
| Idylwilde Brewing | 116 Fawn Dr | Carbondale | Colorado | 81623-9703 | United States | micro | |
| Incantation Brewing | 4233 S Buckley Rd | Aurora | Colorado | 80013-2947 | United States | micro | |
| Incline Brewing | | Larkspur | Colorado | 80118-8721 | United States | planning | |
| Industrial Revolution Brewing Company | 285 Cheesman St | Erie | Colorado | 80516-8464 | United States | micro | |
| Intersect Brewing | 2160 W Drake Rd Unit A1 | Fort Collins | Colorado | 80526-1486 | United States | micro | |
| Iron Bird Brewing Co. | 402 S Nevada Ave | Colorado Springs | Colorado | 80903-2110 | United States | brewpub | |
| Iron Mule Brewery | 514 Perry St Ste C106 | Castle Rock | Colorado | 80104-1711 | United States | micro | |
| Iron Tree Table & Taps | 37 Costello Ave | Florissant | Colorado | 80816 | United States | brewpub | |
| Ironworks Brewery & Pub | 12354 W Alameda Pkwy Ste 110 | Lakewood | Colorado | 80228-2844 | United States | brewpub | |
| Irwin Brewing Company | 326 Belleview | Crested Butte | Colorado | 81224-8706 | United States | micro | |
| J Moe's Brewing Company | 7314 Washington St | Denver | Colorado | 80229-6302 | United States | brewpub | |
| J. Fargo's Family Dining & Micro Brewery / Coyote J Brewing Co | 1209 E Main St | Cortez | Colorado | 81321-2910 | United States | brewpub | |
| Jagged Mountain Brewery | 1139 20th St | Denver | Colorado | 80202-1811 | United States | micro | |
| JAKs Brewing Company | 11860 Stapleton Dr | Peyton | Colorado | 80831 | United States | micro | |
| James Peak Brewery | 70 E First St | Nederland | Colorado | 80466 | United States | brewpub | |
| Jessup Farm Barrel House | 1921 Jessup Dr | Fort Collins | Colorado | 80525-2551 | United States | micro | |
| Joyride Brewing Co | 2501 Sheridan Blvd | Edgewater | Colorado | 80214-1330 | United States | micro | |
| Kannah Creek Brewing Co | 1960 N 12th St | Grand Junction | Colorado | 81501-2912 | United States | brewpub | |
| Kanook Beer Company | | Golden | Colorado | 80403-2674 | United States | planning | |
| Kettle and Spoke Brewery, LLC | 2500 47th St Ste 12 | Boulder | Colorado | 80301-2335 | United States | micro | |
| Kokopelli Beer Company | 8931 Harlan St | Westminster | Colorado | 80031-2931 | United States | brewpub | |
| Lady Justice Brewing Company | 4375 Eaton St | Denver | Colorado | 80212-7308 | United States | micro | |
| Lake City Brewing Company | 130 Bluff St | Lake City | Colorado | 81235 | United States | brewpub | |
| Landlocked Ales | 3225 S Wadsworth Blvd Unit R | Lakewood | Colorado | 80227-5009 | United States | micro | |
| Lariat Lodge Brewing | 27618 Fireweed Dr | Evergreen | Colorado | 80439-8462 | United States | brewpub | |
| Launch Pad Brewery | 884 S Buckley Rd | Aurora | Colorado | 80017-3174 | United States | micro | |
| Left Hand Brewing - RiNo | 4180 Wynkoop Street | Denver | Colorado | 80216 | United States | micro | |
| Left Hand Brewing Company | 1265 Boston Ave | Longmont | Colorado | 80501-5809 | United States | regional | |
| Liquid Mechanics Brewing Company | 297 N US Highway 287 | Lafayette | Colorado | 80026-8932 | United States | micro | |
| Little Machine | 2924 W 20th Ave | Denver | Colorado | 80211-4622 | United States | micro | |
| Littleton Brewing Company | 1201 W Littleton Blvd | Littleton | Colorado | 80120 | United States | planning | |
| Living the Dream Brewing Co. | 9150 Commerce Center Cir Ste 300 | Highlands Ranch | Colorado | 80129-1563 | United States | micro | |
| Living the Dream Sterling Taproom | 8155 Piney River Ave | Littleton | Colorado | 80125 | United States | micro | |
| Local Relic | 320 S Weber St | Colorado Springs | Colorado | 80903-2125 | United States | brewpub | |
| Locavore Beer Works | 5950 S Platte Canyon Rd Ste D13 | Littleton | Colorado | 80123-7539 | United States | micro | |
| Lone Tree Brewing Co | 8222 Park Meadows Dr | Lone Tree | Colorado | 80124-2746 | United States | micro | |
| Lone Tree Brewing Co - Parker | 18425 Pony Express Dr #125 | Parker | Colorado | 80134 | United States | micro | |
| Long Table Brewing | 2895 Fairfax St | Denver | Colorado | 80207-2748 | United States | micro | |
| Lost Friend Brewing Company | 2458 Montebello Square Dr | Colorado Springs | Colorado | 80918-1974 | United States | micro | |
| Lost Highway Brewing | 12741 E Caley Ave Ste 140 | Centennial | Colorado | 80111-6407 | United States | micro | |
| Loveland Aleworks | 118 W 4th St | Loveland | Colorado | 80537-5523 | United States | micro | |
| Lowdown Brewery + Kitchen | 800 N Lincoln St Unit 2 | Denver | Colorado | 80203-2710 | United States | brewpub | |
| Lumpy Ridge Brewing Co | 531 S St Vrain Ave | Estes Park | Colorado | 80517-7416 | United States | micro | |
| Mad Jack's Mountain Brewery | 23 Main St | Bailey | Colorado | 80421 | United States | micro | |