| Beaverhead County | 9 | 1,182 | Dillon Elem, Beaverhead County H S, Lima K-12 Schools, Reichle Elem, Wisdom Elem, Polaris Elem, Grant Elem, Wise River Elem, Jackson Elem |
| Big Horn County | 8 | 2,366 | Hardin Elem, Hardin H S, Lodge Grass Elem, Lodge Grass H S, Wyola Elem, Pryor Elem, Plenty Coups H S, Spring Creek Elem |
| Blaine County | 11 | 1,323 | All 11 Blaine County districts → |
| Broadwater County | 1 | 733 | Townsend K-12 Schools |
| Carbon County | 9 | 1,301 | Red Lodge Elem, Joliet Elem, Bridger K-12 Schools, Red Lodge H S, Joliet H S, Roberts K-12 Schools, Fromberg K-12, Belfry K-12 Schools, Luther Elem |
| Carter County | 4 | 146 | Ekalaka Elem, Carter County H S, Alzada Elem, Hawks Home Elem |
| Cascade County | 12 | 11,338 | All 12 Cascade County districts → |
| Chouteau County | 7 | 701 | Fort Benton Elem, Big Sandy K-12, Fort Benton H S, Highwood K-12, Geraldine K-12, Knees Elem, Benton Lake Elem |
| Custer County | 6 | 1,530 | Miles City Elem, Custer County H S, Kinsey Elem, Kircher Elem, Trail Creek Elem, S Y Elem |
| Daniels County | 1 | 277 | Scobey K-12 Schools |
| Dawson County | 7 | 1,182 | Glendive Elem, Dawson H S, Richey Elem, Richey H S, Deer Creek Elem, Bloomfield Elem, Lindsay Elem |
| Deer Lodge County | 2 | 1,032 | Anaconda Elem, Anaconda H S |
| Fallon County | 2 | 566 | Baker K-12 Schools, Plevna K-12 Schools |
| Fergus County | 14 | 1,605 | All 14 Fergus County districts → |
| Flathead County | 23 | 14,957 | All 23 Flathead County districts → |
| Gallatin County | 21 | 14,138 | All 21 Gallatin County districts → |
| Garfield County | 6 | 189 | Jordan Elem, Garfield County H S, Cohagen Elem, Pine Grove Elem, Kester Elem, Ross Elem |
| Glacier County | 6 | 2,685 | Browning Elem, Browning H S, Cut Bank Elem, Cut Bank H S, East Glacier Park Elem, Mountain View Elem |
| Golden Valley County | 2 | 129 | Lavina K-12 Schools, Ryegate K-12 Schools |
| Granite County | 4 | 391 | Philipsburg K-12 Schools, Drummond Elem, Drummond H S, Hall Elem |
| Hill County | 11 | 2,958 | All 11 Hill County districts → |
| Jefferson County | 7 | 1,864 | Montana City Elem, Clancy Elem, Jefferson H S, Whitehall Elem, Boulder Elem, Whitehall H S, Cardwell Elem |
| Judith Basin County | 3 | 277 | Hobson K-12 Schools, Stanford K-12 Schools, Geyser K-12 Schools |
| Lake County | 12 | 4,166 | All 12 Lake County districts → |
| Lewis and Clark County | 9 | 9,786 | Helena Elem, Helena H S, East Helena K-12, Lincoln K-12 Schools, Augusta Elem, Trinity Elem, Augusta H S, Auchard Creek Elem, Wolf Creek Elem |
| Liberty County | 3 | 249 | Chester-Joplin-Inverness El, Chester-Joplin-Inverness HS, Liberty Elem |
| Lincoln County | 9 | 2,391 | Libby K-12 Schools, Eureka Elem, Lincoln County H S, Troy Elem, Troy H S, Fortine Elem, McCormick Elem, Trego Elem, Yaak Elem |
| Madison County | 6 | 989 | Ennis K-12 Schools, Twin Bridges K-12 Schools, Sheridan Elem, Harrison K-12 Schools, Sheridan H S, Alder Elem |
| McCone County | 3 | 253 | Circle Elem, Circle H S, Vida Elem |
| Meagher County | 1 | 165 | White Sulphur Spgs K-12 |
| Mineral County | 3 | 678 | Superior K-12 Schools, St Regis K-12 Schools, Alberton K-12 Schools |
| Missoula County | 14 | 14,099 | All 14 Missoula County districts → |
| Musselshell County | 4 | 608 | Roundup Elem, Roundup High School, Melstone Elem, Melstone H S |
| Park County | 9 | 1,656 | Livingston Elem, Park H S, Shields Valley Elem, Gardiner Elem, Arrowhead Elem, Shields Valley H S, Gardiner H S, Pine Creek Elem, Cooke City Elem |
| Petroleum County | 1 | 69 | Winnett K-12 Schools |
| Phillips County | 5 | 662 | Malta K-12 Schools, Dodson K-12, Saco Elem, Whitewater K-12 Schools, Saco H S |
| Pondera County | 7 | 802 | Conrad Elem, Conrad H S, Heart Butte K-12 Schools, Valier Elem, Dupuyer Elem, Miami Elem, Valier H S |
| Powder River County | 3 | 234 | Broadus Elem, Powder River Co Dist H S, Biddle Elem |
| Powell County | 7 | 702 | Deer Lodge Elem, Powell County H S, Avon Elem, Ovando Elem, Elliston Elem, Garrison Elem, Helmville Elem |
| Prairie County | 1 | 161 | Terry K-12 Schools |
| Ravalli County | 8 | 5,729 | Hamilton K-12 Schools, Corvallis K-12 Schools, Florence-Carlton K-12 Schls, Stevensville Elem, Stevensville H S, Darby K-12 Schools, Lone Rock Elem, Victor K-12 Schools |
| Richland County | 10 | 1,845 | Sidney Elem, Sidney H S, Fairview Elem, Savage Elem, Fairview H S, Lambert Elem, Rau Elem, Savage H S, Lambert H S, Brorson Elem |
| Roosevelt County | 12 | 2,353 | All 12 Roosevelt County districts → |
| Rosebud County | 9 | 1,463 | Lame Deer Elem, Colstrip Elem, Forsyth Elem, Lame Deer H S, Colstrip H S, Forsyth H S, Ashland Elem, Rosebud K-12, Birney Elem |
| Sanders County | 8 | 1,321 | Plains K-12, Thompson Falls Elem, Hot Springs K-12, Thompson Falls H S, Noxon Elem, Noxon H S, Dixon Elem, Trout Creek Elem |
| Sheridan County | 3 | 486 | Plentywood K-12 Schools, Medicine Lake K-12 Schools, Westby K-12 Schools |
| Silver Bow County | 4 | 4,364 | Butte Elem, Butte H S, Ramsay Elem, Divide Elem |
| Stillwater County | 12 | 1,336 | All 12 Stillwater County districts → |
| Sweet Grass County | 5 | 484 | Big Timber Elem, Sweet Grass County H S, Melville Elem, McLeod Elem, Greycliff Elem |
| Teton County | 11 | 1,055 | Choteau Elem, Fairfield Elem, Choteau H S, Fairfield H S, Dutton/Brady K-12 Schools, Greenfield Elem, Power Elem, Power H S, Pendroy Elem, Bynum Elem, Golden Ridge Elem |
| Toole County | 3 | 679 | Shelby Elem, Shelby H S, Sunburst K-12 Schools |
| Treasure County | 1 | 92 | Hysham K-12 Schools |
| Valley County | 8 | 1,115 | Glasgow K-12 Schools, Nashua K-12 Schools, Frazer Elem, Hinsdale Elem, Lustre Elem, Opheim K-12 Schools, Frazer H S, Hinsdale H S |
| Wheatland County | 3 | 328 | Harlowton K-12, Judith Gap Elem, Judith Gap H S |
| Wibaux County | 1 | 139 | Wibaux K-12 Schools |
| Yellowstone County | 18 | 23,520 | All 18 Yellowstone County districts → |
