| School Name | Street Address | City |
| Accelerated Schools * | 2160 S Cook St | Denver |
| Acts Academy Ministries | 10555 w. 44th ave | Wheat Ridge |
| Adventist Christian School | 612 23rd Avenue | Greeley |
| Aero Ridge Christian Academy | 4925 Farmingdale Dr | Colorado Springs |
| Alexander Dawson School | 10455 Dawson Drive | Lafayette |
| All Souls | 4951 S Pennsylvania St | Englewood |
| Alpine Valley School | 4501 Parfet Street | Wheat Ridge |
| Ambleside Colorado | 9941 Lone Tree Parkway | Lone Tree |
| Anastasis Academy | 2825 Rockbridge Drive | Highlands Ranch |
| Annunciation Catholic School | 3536 Lafayette St | Denver |
| Arma Dei Academy | 341 E. Wildcat Reserve Parkway | Highlands Ranch |
| Arrupe Jesuit High School | 4343 Utica St | Denver |
| Ascend Micro School | 6145 Shoup Road | Colorado Springs |
| Aspen Academy * | 5859 S University Blvd | Greenwood Village |
| Assumption Catholic School | 2341 E 78th Avenue | Denver |
| Augustine Classical Academy | 480 S. Kipling | Lakewood |
| Ave Maria Catholic School | 9056 E Parker Road | Parker |
| Belleview Christian School | 3455 W. 83rd Ave | Westminster |
| BETH EDEN BAPTIST SCHOOL | 2600 WADSWORTH BLVD | Wheat Ridge |
| Beth Jacob High School of Denver | 5100 W. 14th Ave | Denver |
| Bethlehem Lutheran School | 2100 Wadsworth Blvd. | Lakewood |
| Bl. Miguel Pro Catholic Academy | 3050 W. 76th Ave | Westminster |
| Blessed Sacrament Catholic School | 1958 Elm St. | Denver |
| Bookcliff Christian School | 2702 Patterson Road | Grand Junction |
| Boulder Country Day School * | 4820 Nautilus Court North | Boulder |
| Boulder Sudbury School | 3800 Plateau Road | Niwot |
| BRAVE Academy | 3651 S Colorado Blvd | Cherry Hills Village |
| Brighton Adventist Academy | 820 S. 5th Ave | Brighton |
| Campion Academy | 300 42nd St. SW | Loveland |
| Canon Christian Academy | 2951 East US Hwy 50 | Canon City |
| Castle Rock Christian Academy | 4881 Cherokee Dr. Door J | Castle Rock |
| Catch a Star Academy | 15801 E. Centretech Circle | Aurora |
| CedarWood Christian Academy | 11430 E 19th Ave | Aurora |
| Cherry Hills Christian School | 3900 Grace Blvd | Highlands Ranch |
| Chesterton Academy Of Our Lady of Victory | 6495 S. Colorado Blvd. | Centennial |
| Christ Our Redeemer Lutheran | 17700 East Iliff Avenue | Aurora |
| Christ the King | 860 Elm St | Denver |
| Christian Core Academy | 608 E Drake Rd | Fort Collins |
| Christian Growth Academy | 1906 N. Hudson Ave | Pueblo |
| Colorado Academy * | 3800 S Pierce St | Denver |
| Colorado Christian Academy | 333 Inverness Dr S | Englewood |
| Colorado Classical School | 7691 S University Blvd | Centennial |
| Colorado Springs Christian Schools | 4855 Mallow Rd | Colorado Springs |
| Colorado West Christian School | 2705 Sunnyside Rd | Montrose |
| Connect Academy | 305 McGregor Dr. | Gypsum |
| Corpus Christi Catholic Academy | 2410 N. Cascade Avenue | Colorado Springs |
| Crossroads School | 833 15th Ave. | Longmont |
| Dayspring Christian Academy | 3734 W 20th ST. | Greeley |
| Denver Academy * | 4400 East Iliff Avenue | Denver |
| Denver Academy of Torah | 6825 E Alameda Ave | Denver |
| Denver Christian School | 3898 S Teller St | Lakewood |
| Divine Redeemer Catholic School | 901 N. Logan Avenue | Colorado Springs |
| Escuela de Guadalupe | 660 Julian Street | Denver |
| Evangel Christian Academy | 4052 Nonchalant Circle | Colorado Springs |
| Faith Christian Academy | 6210 Ward Road | Arvada |
| Flatirons Academy | 12000 Zuni St | Westminster |
| Forge Christian High School | 4890 Carr Street | Arvada |
| Fort Collins Christian School | 2040 Nancy Gray Ave. | Fort Collins |
| Frassati Catholic Academy | 3951 Cottonwood Lakes Blvd. | Thornton |
| Front Range Christian School | 6657 W Ottowa Ave Ste A-17 | Littleton |
| Global Ex Academy | 1635 Paris Street | Aurora |
| Good Shepherd Catholic School | 620 Elizabeth St. | Denver |
| Grand County Christian Academy | 274 Ponderosa Trail | Tabernash |
| Havern School * | 4000 S Wadsworth Blvd | Littleton |
| Heritage Christian | 2506 Zurich Drive | Fort Collins |
| Heritage Christian Academy - Colorado Springs | 3965 Clearview Loop | Colorado Springs |
| Hillel Academy | 450 S Hudson St | Denver |
| HMS Richards Adventist School | 342 42nd Street SW | Loveland |
| Holy Family Catholic School | 786 26 1/2 Road | Grand Junction |
| Holy Family High School | 5195 W. 144th Avenue | Broomfield |
| Holy Trinity Academy | 200 Church St | Trinidad |
| Hope Community Christian Academy | 115 Ute St. | Ignacio |
| Immanuel Lutheran School | 4650 Sunview Dr. | Loveland |
| Inner City Christian School | 2280 E 16th Ave | Denver |
| J.K. Mullen High School | 3601 S Lowell Blvd | Denver |
| Kent Denver School * | 4000 E. Quincy Ave | Englewood |
| King Alfred Academy | 639 Samuel Wade Rd | Paonia |
| Landmark Baptist School | 1600 Ute Ave. | Grand Junction |
| Liberty Classical Academy | 5175 County Road 335 | New Castle |
| Life Academy | 636 29 Road | Grand Junction |
| Lighthouse Christian Academy | 11502 Hwy 145 | Cortez |
| Longmont Christian School | 1440 Collyer Street | Longmont |
| Lord of Life Lutheran School | 12021 Northaven Circle | Thornton |
| Lutheran Church and School of Messiah | 840 N. 11th St. | Grand Junction |
| Lutheran High School Parker | 11249 Newlin Gulch Blvd | Parker |
| Mackintosh Academy * | 7018 South Prince Street | Littleton |
| Mile High Academy | 1733 Dad Clark Dr | Highlands Ranch |
| Montessori School of Evergreen | 6979 Hwy 73 | Evergreen |
| Most Precious Blood | 3959 E. Iliff Ave. | Denver |
| Mt. Zion Christian School | c/o Springs Church | Colorado Springs |
| Nativity: Faith & Reason | 900 W. Midway Blvd. | Broomfield |
| Northern Colorado Christian Academy - Eaton | 1561 Benjamin Drive | Eaton |
| Notre Dame School | 2165 S. Zenobia St. | Denver |
| Our Lady Help of Christians Academy | 32100 E Colfax Service Road | Watkins |
| Our Lady of Fatima | 10530 W. 20th Avenue | Lakewood |
| Our Lady of Loreto Catholic School | 18000 E. Arapahoe Rd. | Foxfield |
| Our Lady of Lourdes - North Campus | 2256 S. Logan St. | Denver |
| Our Lady of Lourdes, South Campus | 3301 S. Sherman St. | Englewood |
| Our Lady of Walsingham Academy | 2410 North Cascade Ave | Colorado Springs |
| Our Lady Seat of Wisdom, a Chesterton Academy | 11385 Grant Dr. | Northglenn |
| Our Savior Lutheran Classical School | 56 Meadows Drive | Pagosa Springs |
| Pagosa Valor Academy | 264 Village Drive | Pagosa Springs |
| Parkhill Christian | 4235 Parkhill Place | Pueblo |
| Peace With Christ Christian | 3290 S Tower Road | Aurora |
| Pikes Peak Academy | 828 E. Pikes Peak Ave. | Colorado Springs |
| Pikes Peak Christian School | 5905 Flintridge Drive | Colorado Springs |
| Pope John Paul II Academy | 67051 Sunnyside Rd. | Montrose |
| Regina Caeli Academy | 2121 Dad Clark Dr. | Highlands Ranch |
| Regis Jesuit * | 6400 S. Lewiston Way | Aurora |
| Reign Christian Academy | 1501 S Zuni St | Denver |
| Renaissance Montessori Academy | 16740 Keystone Blvd | Parker |
| Resurrection Christian School - Loveland | 6508 E Crossroads Blvd | Loveland |
| Rock Solid Christian Academy | 29 Del Mar Circle | Aurora |
| Rocky Mountain Christian Academy | 9447 Niwot Road | Niwot |
| Rocky Mountain Lutheran High School | 10391 Luther Court | Commerce City |
| Sacred Heart of Jesus | 1317 Mapleton Ave | Boulder |
| Saint John the Evangelist | 1730 West 12th Street | Loveland |
| Sangre De Cristo Christian School | 60260 State Hwy 69 | Westcliffe |
| Shepherd of the Valley Lutheran School | 8997 W 88th Avenue | Westminster |
| Shining Mountain Waldorf School * | 999 Violet Ave | Boulder |
| Shrine of St. Anne School | 7320 Grant Place | Arvada |
| Sojournings Academy | 28670 Highway 72 | Golden |
| Sophia Montessori Academy | 320 S Sherman St | Denver |
| Southeast Christian School | 9650 S Jordan Road | Parker |
| Springs Adventist Academy | 5410 Palmer Park Blvd | Colorado Springs |
| St. Anne's Episcopal School * | 2701 S. York St. | Denver |
| St. Clare of Assisi Catholic School | 31622 US Highway 6 | Edwards |
| St. Columba School | 1801 E 3rd Avenue | Durango |
| St. Elizabeth's School | 1800 Pontiac St. | Denver |
| St. Gabriel Classical Academy | 4727 Coach House Drive | Colorado Springs |
| St. James Catholic School | 1250 Newport St. | Denver |
| St. John Neumann Catholic School | 2415 E. Orman Ave | Pueblo |
| St. John Paul II High School | 1250 7th Street | Windsor |
| St. John Paul the Great Catholic High School | 2330 S. Sherman St | Denver |
| St. John the Baptist | 350 Emery St. | Longmont |
| St. John's School | 700 S Franklin Street | Denver |
| St. Joseph Catholic School | 127 N.Howes Street | Fort Collins |
| St. Louis | 925 Grant Ave. | Louisville |
| St. Mary Catholic School | 6833 S. Prince Street | Littleton |
| St. Mary Catholic School | 2351 22nd Avenue | Greeley |
| St. Mary's Academy * | 4545 S University Blvd | Englewood |
| St. Marys High School | 2501 E Yampa St | Colorado Springs |
| St. Paul Catholic School | 1601 Mesa Avenue | Colorado Springs |
| St. Peter Catholic School | 124 1st Street | Monument |
| St. Rose of Lima | 1345 West Dakota Avenue | Denver |
| St. Stephen Catholic School | 414 S. Hyland Park Drive | Glenwood Springs |
| St. Therese Catholic School | 1200 Kenton St | Aurora |
| St. Therese Catholic School | 320 Goodnight Avenue | Pueblo |
| St. Thomas More Catholic School | 7071 E. Otero Ave. | Centennial |
| St. Vincent de Paul | 1164 S Josephine St. | Denver |
| Stanley British Primary School * | 350 Quebec Street | Denver |
| Steamboat Christian Academy | 821 Dougherty Road | Steamboat Springs |
| Sts. Peter and Paul Catholic STEM School | 3920 Pierce St. | Wheat Ridge |
| Summit Christian School | 371 E La Bonte St | Dillon |
| Summit Classical Academy | 3031 W 144th Avenue | Broomfield |
| Tara High School * | 4180 19th St | Boulder |
| The Colorado Springs School * | 21 Broadmoor Ave | Colorado Springs |
| The Denver Waldorf School * | 2100 South Pennsylvania St | Denver |
| The International School of Denver | 7701 E 1st Pl Unit C | Denver |
| The Liberty School | 3107 Western Avenue | Durango |
| The Mate School | 1255 Centaur Village Drive | Lafayette |
| The McClelland School | 415 E. Abriendo Ave | Pueblo |
| The Montessori Children's House of Denver * | 2211 Xanthia Way | Denver |
| The Nature Lab Farm and Forest School | 102 Crystal Park Rd | Manitou Springs |
| The Peak School | 40 W Main Street | Frisco |
| The University School | 2713 W. Cucharras St | Colorado Springs |
| Trinity Lutheran School | 4740 N. State Hwy 83 | Franktown |
| Trinity Lutheran School | 701 W. Evans Ave. | Pueblo |
| Twelve Stones Classical School | 10285 Federal Drive | Colorado Springs |
| Vail Christian Academy | 31725 Hwy 6 | Edwards |
| Vail Christian High School * | 31621 Highway 6 | Edwards |
| Vail Valley Unbound | 137 Main Street | Edwards |
| Valor Christian High School * | 3775 Grace Blvd | Highlands Ranch |
| Veritas Christian Academy | 2910 Clark Street | Alamosa |
| Vertical Skills Academy * | 32156 Castle Ct | Evergreen |
| Vista Ridge Academy | 3100 Ridgeview Dr | Erie |
| Worldmind Nature Immersion School | 1515 Race Street | Denver |
| Yeshiva toras Chaim * | 1555 stuart st | Denver |
| Zion Lutheran School | 2600 S Wadsworth Blvd |
Denver |