| Name | Address, Zip |
| Veterans Of Foreign Wars Of The Us Aux To Horse Plains Post No 3596 | Po Box 831, 59859-0831 |
| J A Mcgowan Foundation | Po Box 1546, 59859-1546 |
| Ancient Free & Accepted Masons Of Montana | Po Box 612, 59859-0612 |
| Ancient Free & Accepted Masons Of Montana | Po Box 1647, 59859-1647 |
| Aglow International | Po Box 1254, 59859-1254 |
| Plains Alliance Church Of The Christian And Missionary Alliance | Po Box 368, 59859-0368 |
| Clark Fork Soccer Alliance | Po Box 673, 59859-0673 |
| Plains Community Ambulance Inc | Po Box 268, 59859-0268 |
| Future Farmers Of America State Assocation & Local Chapter | 220 Webber Ln, 59859-9483 |
| American Legion Auxiliary | Po Box 1318, 59859-1318 |
| Mt West Center For Innovation Education And Health Improvement | Po Box 1590, 59859-1590 |
| Plains Volunteer Fire Department Relief Association | Po Box 567, 59859-0567 |
| Plains Youth Softball Association | Po Box 1099, 59859-1099 |
| Plains-paradise Senior Citizens Association Inc | Po Box 935, 59859-0935 |
| Plains Golf Association | Po Box 995, 59859-0995 |
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| International Association Of Lions Clubs | Po Box 721, 59859-0721 |
| Plains-paradise Rural Fire Association | 20 Old Airport Rd, 59859-7655 |
| Wildhorse Sports Association | Po Box 4, 59859-0004 |
| Plains Pickleball Association | Po Box 41, 59859-0041 |
| Wildhorse Plains Back Country Horseman | Po Box 222, 59859-0222 |
| Plains Bible Church | Po Box 942, 59859-0942 |
| Camp Bighorn | 1850 Mt Highway 135, 59859-9461 |
| Little Bitterroot Services | Po Box 189, 59859-0189 |
| Plains Booster Club | Po Box 603, 59859-0603 |
| Camas Prairie Neighbors | 220 Webber Ln, 59859-9483 |
| Cancer Network Of Snaders County | Po Box 1311, 59859-1311 |
| Costner Care Family Ministries | 406 W Railroad Ave, 59859-9597 |
| Church Of Christ | Po Box 372, 59859-0372 |
| Plains Paradise United Methodist Church | Po Box 699, 59859-0699 |
| First Lutheran Church | Po Box 475, 59859-0475 |
| Harvest Community Church Of God | Po Box 487, 59859-0487 |
| Church Of The Move | Po Box 767, 59859-0767 |
| Clark Fork Enrichment Corportion | Po Box 245, 59859-0245 |
| Clark Fork Valley Hospital Foundation Inc | Po Box 768, 59859-0768 |
| Sanders County Club Sports | 4 Hideaway Ln, 59859-9523 |
| Plains Womans Club | Po Box 813, 59859-0813 |
| Committee For Safe Swimming | Po Box 1546, 59859-1546 |
| Montana Congress Of Parents Teachers Students | Po Box 71, 59859-0071 |
| Sanders County Fair Foundation | Po Box 1546, 59859-1546 |
| Diamond Days Foundation | 125 Cedar Creek Rd, 59859-9567 |
| Department Of Montana Veterans Of Foreign Wars Of The United States | 201 W Lynch St, 59859-7604 |
| Friends Of Plains District Library | Po Box 1441, 59859-1441 |
| Montana Federation Of Public Employees | 7975 Mt Highway 200, 59859-9414 |
| Montana Federation Of Public Employees | 26 Blackjack Dr, 59859-9376 |
| Thrivent Financial For Lutherans | 12 Rams Head Dr, 59859-9230 |
| Plains Library Foundation | Po Box 248, 59859-0248 |
| Gospel Way | Po Box 1017, 59859-1017 |
| Plains Hospitals Inc | Po Box 768, 59859-0768 |
| Latin Mass Montana Inc | Po Box 235, 59859-0235 |
| Lion Pathfinder Inc | Po Box 898, 59859-0898 |
| Toastmasters International | Po Box 522, 59859-0522 |
| Joint Operation Mariposa | Po Box 261, 59859-0261 |
| Vision Keepers | 121 Dupuis Mill Rd, 59859-9624 |
| Little Star Pre-school | Po Box 52, 59859-0052 |
| Warner Ranch Ministries | 22 Warner Ranch Way, 59859-9232 |
| Plains Swim Team | Po Box 1110, 59859-1110 |
| Sustainable Roots | Po Box 1150, 59859-1150 |
| Sonoraevangelicalministrieslimited | Po Box 6, 59859-0006 |
| Tandem | 42 Tyler M Rd, 59859-9501 |
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