| Business | Phone |
| United Methodist Church-Plains 206 W Meany St, Plains 59859 | (406) 826-3526 |
| St James Catholic Church 109 W Meany St, Plains 59859 | (406) 826-3668 |
| Church Of Jesus Christ Of Lds 169 Helterline Ln, Plains 59859 | (406) 826-3265 |
| Clark Fork Baptist Church 105 E Lynch St, Plains 59859 | (406) 826-3608 |
| First Church Of God 407 1st St W, Plains 59859 | (406) 826-4440 |
| First Lutheran Church 604 S 5th Ave, Plains 59859 | (406) 826-3516 |
| Plains Alliance Church 500 W 5th, Plains 59859 | (406) 826-3916 |
| Plains Bible Chapel 243 Compbest Creek Rd, Plains 59859 | (406) 826-3118 |
| Plains Church Of Christ Po Box 98, Plains 59859 | (406) 826-3427 |