| Business | Phone |
| Custer Elementary School 371 Crook St, Custer 57730 | (605) 673-4483 |
| Custer High School 527 Montgomery St, Custer 57730 | (605) 673-4473 |
| Custer Learning Ctr 215 N 3rd St, Custer 57730 | (605) 673-3592 |
| Custer Preschool 147 N 5th St, Custer 57730 | (605) 673-3515 |
| Custer School District 16-1 147 N 5th St, Custer 57730 | (605) 673-3154 |