| Adams County |
| Aurora (Fletcher Station) Post Office | 1550 Dayton Street | | Aurora | CO | 80010 |
| Brighton Post Office | 90 N 4th Avenue | | Brighton | CO | 80601 |
| City Clerk's Office | 4800 W 92nd Avenue | | Westminster | CO | 80031 |
| Fairplay Post Office | 517 Hathaway Street | | Fairplay | CO | 80440 |
| Harris Park Station Post Office | 7262 Meade Street | | Westminster | CO | 80030 |
| Watkins Post Office | 33151 E 16th Drive | | Watkins | CO | 80137 |
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| Alamosa County |
| Adams State College | 1st Street & Stadium Drive | Student Union Building | Alamosa | CO | 81102 |
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| Arapahoe County |
| Arapahoe County Recorder | 5334 S Prince Street | | Littleton | CO | 80166 |
| Aurora Gateway Station Post Office | 2500 S Abilene Street | | Aurora | CO | 80014 |
| Aurora Main Post Office | 16890 E Alameda Parkway | | Aurora | CO | 80017 |
| Littleton City Clerk's Office | 2255 W Berry Avenue | Littleton City Clerk's Office | Littleton | CO | 80165 |
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| Archuleta County |
| Arboles Post Office | 86 CR 982 | | Arboles | CO | 81121 |
| Pagosa Springs Post Office | 250 Hot Springs Boulevard | | Pagosa Springs | CO | 81147 |
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| Baca County |
| See neighboring counties | | | | CO | |
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| Bent County |
| See neighboring counties | | | | CO | |
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| Boulder County |
| Boulder Main Post Office | 1905 15th Street | | Boulder | CO | 80302 |
| Lafayette Post Office | 603 S Public Road | | Lafayette | CO | 80026 |
| Longmont Main Post Office | 201 Coffman Street | | Longmont | CO | 80501 |
| Louisville Main Post Office | 556 S McCaslin Boulevard | | Louisville | CO | 80027 |
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| Broomfield County |
| City & County of Broomfield | 1 DesCombes Drive | | Broomfield | CO | 80020 |
| Eagle View Station Post Office | 8800 W 116th Circle | | Broomfield | CO | 80021 |
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| Chaffee County |
| Buena Vista Post Office | 110 Brookdale Ave | | Buena Vista | CO | 81211 |
| Salida Post Office | 310 D Street | | Salida | CO | 81201 |
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| Cheyenne County |
| Kit Carson Post Office | 104 Main Street | | Kit Carson | CO | 80825 |
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| Clear Creek County |
| Idaho Springs Post Office | 2420 Colorado Boulevard | | Idaho Springs | CO | 80452 |
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| Conejos County |
| See neighboring counties | | | | CO | |
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| Costilla County |
| See neighboring counties | | | | CO | |
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| Crowley County |
| Crowley Post Office | 208 Broadway Avenue | | Crowley | CO | 81033 |
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| Custer County |
| See neighboring counties | | | | CO | |
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| Delta County |
| Delta Post Office | 360 Meeker Street | | Delta | CO | 81416 |
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| Denver County |
| Capitol Hill Station Post Office | 1541 Marion Street | | Denver | CO | 80205 |
| Denver (Downtown Station) Post Office | 951 20th Street | | Denver | CO | 80202 |
| Denver (Sunnyside Sta.) Post Office | 1636 W 46th Avenue | | Denver | CO | 80211 |
| Denver County Court | 1437 Bannock Street | Room 140 | Denver | CO | 80204 |
| University Park Station Post Office | 3800 Buchtel Boulevard | | Denver | CO | 80210 |
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| Dolores County |
| See neighboring counties | | | | CO | |
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| Douglas County |
| Highlands Ranch Branch Post Office | 9609 S University Boulevard | | Littleton | CO | 80126 |
| Larkspur Main Post Office | 96 Perry Park Avenue | | Larkspur | CO | 80118 |
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| Eagle County |
| Eagle Post Office | 264 Chambers Avenue | | Eagle | CO | 81631 |
| Vail Post Office | 1300 N Frontage Road W | | Vail | CO | 81657 |
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| El Paso County |
| Briargate Station Post Office | 8585 Criterion Drive | | Colorado Springs | CO | 80920 |
| Calhan Post Office | 655 Cascade Avenue | | Calhan | CO | 80808 |
| Cheyenne Mountain Station Post Office | 1540 S 8th Street | | Colorado Springs | CO | 80906 |
| Cimarron Hills Station Post Office | 5925 Galley Road | | Colorado Springs | CO | 80915 |
| GMF Finance Station Post Office | 3655 E Fountain Boulevard | | Colorado Springs | CO | 80910 |
| Main Office Post Office | 201 E Pikes Peak Avenue | | Colorado Springs | CO | 80903 |
| Monument Main Post Office | 545 3rd Street | | Monument | CO | 80132 |
| Palmer Lake Post Office | 10 Primrose | | Palmer Lake | CO | 80133 |
| Rockrimmon Station Post Office | 5001 Centennial Boulevard | | Colorado Springs | CO | 80919 |
| Security Station Post Office | 5755 Kittery Drive | | Colorado Springs | CO | 80911 |
| Templeton Station Post Office | 4356 Montebello Drive | | Colorado Springs | CO | 80918 |
| USAF Academy Post Office | 5136 Community Center Drive | | USAF Academy | CO | 80840 |
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| Elbert County |
| Agate Post Office | 40992 US Highway 40 | | Agate | CO | 80101 |
| Elizabeth Main Post Office | 795 E Kiowa Avenue | | Elizabeth | CO | 80107 |
| Kiowa Post Office | 708 Commanche Avenue | | Kiowa | CO | 80117 |
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| Fremont County |
| Canon City Post Office | 1501 E Main Street | | Canon City | CO | 81212 |
| Florence Main Post Office | 121 N Pikes Peak Avenue | | Florence | CO | 81226 |
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| Garfield County |
| Glenwood Springs Post Office | 113 9th Street | | Glenwood Springs | CO | 81601 |
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| Gilpin County |
| See neighboring counties | | | | CO | |
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| Grand County |
| Granby Post Office | 54 Zero Street | | Granby | CO | 80446 |
| Hot Sulphur Springs Post Office | 506 Grand Avenue | | Hot Sulphur Springs | CO | 80451 |
| Winter Park Main Post Office | 78490 US Highway 40 | | Winter Park | CO | 80482 |
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| Gunnison County |
| Crested Butte Post Office | 217 Elk Avenue | | Crested Butte | CO | 81224 |
| Gunnison Post Office | 200 N Wisconsin Street | | Gunnison | CO | 81230 |
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| Hinsdale County |
| See neighboring counties | | | | CO | |
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| Huerfano County |
| Walsenburg Post Office | 204 E 6th Street | | Walsenburg | CO | 81089 |
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| Jackson County |
| Jackson County District Court | 396 LaFever Street | | Walden | CO | 80480 |
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| Jefferson County |
| Arvada Post Office | 5885 Allison Street | | Arvada | CO | 80001 |
| City of Arvada | 8101 Ralston Road | | Arvada | CO | 80002 |
| City of Golden | 911 10th Street | | Golden | CO | 80401 |
| City of Wheat Ridge | 7500 W 29th Avenue | | Wheat Ridge | CO | 80033 |
| Evergreen Post Office | 3649 Evergreen Parkway | | Evergreen | CO | 80439 |
| Golden Post Office | 1100 Johnson Road | | Golden | CO | 80401 |
| Idledale Post Office | 21659 Highway 74 | | Idledale | CO | 80453 |
| Lakewood Post Office | 10799 W Alameda Avenue | | Lakewood | CO | 80226 |
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| Kiowa County |
| See neighboring counties | | | | CO | |
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| Kit Carson County |
| Burlington Post Office | 259 14th St | | Burlington | CO | 80807 |
| Kit Carson County Combined Courts | 251 16th Street | Suite 301 | Burlington | CO | 80807 |
| Vona Post Office | 1263 1st Avenue | | Vona | CO | 80861 |
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| La Plata County |
| Bayfield Main Post Office | 145 W Park Street | | Bayfield | CO | 81122 |
| Durango Post Office | 222 W 8th Street | | Durango | CO | 81301 |
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| Lake County |
| Leadville Post Office | 130 W 5th Street | | Leadville | CO | 80461 |
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| Larimer County |
| Estes Park Post Office | 215 W Riverside Drive | | Estes Park | CO | 80517 |
| Fort Collins City Clerk | 300 LaPorte Avenue | | Fort Collins | CO | 80521 |
| Ft. Collins Main Post Office | 301 E Boardwoalk Drive | | Fort Collins | CO | 80525 |
| Larimer County - Citizen Info. Center | 200 W Oak Street | | Fort Collins | CO | 80521 |
| Livermore Post Office | 55 County Road 74E | | Livermore | CO | 80536 |
| Loveland Post Office | 446 E 29th Street | | Loveland | CO | 80538 |
| Town of Berthoud | 328 Massachusetts Avenue | | Berthoud | CO | 80513 |
| Wellington Post Office | 3829 Cleveland Ave | | Wellington | CO | 80549 |
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| Las Animas County |
| Trinidad Main Post Office | 301 E Main Street | | Trinidad | CO | 81082 |
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| Lincoln County |
| Lincoln County Combined Court | 103 3rd Avenue | | Hugo | CO | 80821 |
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| Logan County |
| Logan County District Court | 110 Riverview Road | | Sterling | CO | 80751 |
| Peetz Station Post Office | 602 Main Street | | Peetz | CO | 80747 |
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| Mesa County |
| Clifton Main Post Office | 3252 F Road | | Clifton | CO | 81520 |
| Grand Junction Post Office | 241 N 4th Street | | Grand Junction | CO | 81501 |
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| Mineral County |
| See neighboring counties | | | | CO | |
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| Moffat County |
| Craig Post Office | 556 Pershing Street | | Craig | CO | 81625 |
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| Montezuma County |
| Cortez Post Office | 35 S Beech Street | | Cortez | CO | 81321 |
| Dolores Post Office | 1000 Railroad Avenue N | | Dolores | CO | 81323 |
| Mancos Post Office | 291 N Walnut Street | | Mancos | CO | 81328 |
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| Montrose County |
| Montrose Post Office | 321 S 1st Street | | Montrose | CO | 81401 |
| Nucla Post Office | 145 W 15th Avenue | | Nucla | CO | 81424 |
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| Morgan County |
| Fort Morgan Main Post Office | 300 State Street | | Fort Morgan | CO | 80701 |
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| Otero County |
| LaJunta Post Office | 324 Colorado Avenue | | LaJunta | CO | 81050 |
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| Ouray County |
| Ouray Post Office | 620 Main Street | | Ouray | CO | 81427 |
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| Park County |
| See neighboring counties | | | | CO | |
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| Phillips County |
| Holyoke Post Office | 226 S Interocean Avenue | | Holyoke | CO | 80734 |
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| Pitkin County |
| Aspen Post Office | 235 Puppy Smith Street | | Aspen | CO | 81611 |
| Basalt Main Post Office | 12 Midland Avenue | | Basalt | CO | 81621 |
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| Prowers County |
| Wiley Post Office | 301 Main Street | | Wiley | CO | 81092 |
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| Pueblo County |
| Midtown (Pueblo) Post Office | 1000 W 6th Street | | Pueblo | CO | 81003 |
| Pueblo Belmont Station Post Office | 1025 E US Highway 50 Bypass | | Pueblo | CO | 81001 |
| Pueblo Main Post Office | 1022 Fortino Boulevard | | Pueblo | CO | 81008 |
| Sunset Station Post Office | 3000 Wedgewood Drive | | Pueblo | CO | 81005 |
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| Rio Blanco County |
| Meeker Post Office | 365 6th Street | | Meeker | CO | 81641 |
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| Rio Grande County |
| Monte Vista Main Post Office | 150 Washinton Street | | Monte Vista | CO | 81144 |
| South Fork Post Office | 130 W Frontage Road | | South Fork | CO | 81154 |
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| Routt County |
| Steamboat Springs Main Post Office | 200 Lincoln Avenue | | Steamboat Springs | CO | 80487 |
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| Saguache County |
| Crestone Post Office | 166 S Alder Street | | Crestone | CO | 81131 |
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| San Juan County |
| See neighboring counties | | | | CO | |
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| San Miguel County |
| Telluride Post Office | 150 S Willow Street | | Telluride | CO | 81435 |
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| Sedgwick County |
| See neighboring counties | | | | CO | |
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| Summit County |
| Breckenridge Post Office | 305 S Ridge Street | | Breckenridge | CO | 80424 |
| Dillon Post Office | 500 Lake Dillon Drive | | Dillon | CO | 80435 |
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| Teller County |
| Cripple Creek Post Office | 319 W Carr Street | | Cripple Creek | CO | 80813 |
| Divide Main Post Office | 66 Hybrook Road S | | Divide | CO | 80814 |
| Florissant Post Office | 18101 County Road 1 | | Florissant | CO | 80816 |
| Woodland Park Main Post Office | 300 W South Avenue | | Woodland Park | CO | 80866 |
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| Washington County |
| See neighboring counties | | | | CO | |
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| Weld County |
| Ault Post Office | 122 1st Avenue | | Ault | CO | 80610 |
| Erie Main Post Office | 150 Wells Street | | Erie | CO | 80516 |
| Evans Post Office | 3344 11th Avenue | | Evans | CO | 80620 |
| Fort Lupton Post Office | 533 4th Street | | Fort Lupton | CO | 80621 |
| Frederick Post Office | 411 Oak Street | | Frederick | CO | 80530 |
| Greeley Post Office | 925 11th Avenue | | Greeley | CO | 80631 |
| Hudson Post Office | 738 Cedar Street | | Hudson | CO | 80642 |
| Johnstown Post Office | 121 Castle Pines Boulevard | | Johnstown | CO | 80534 |
| Kersey Post Office | 331 1st Street | | Kersey | CO | 80644 |
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| Yuma County |
| Joes Post Office | 6461 US Highway 36 | | Joes | CO | 80822 |
| Wray Main Post Office | 407 W 7th Street | | Wray | CO | 80758 |
| Yuma County Combined Court | 310 Ash Street | | Wray | CO | 80758 |
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