| Business | Phone |
| Oliver-Mercer Special Ed Unit 238 1st Ave, Hazen 58545 | (701) 748-6383 |
| Hazen Elementary School 519 1st Ave Ne, Hazen 58545 | (701) 748-6120 |
| Hazen High School 520 1st Ave Ne, Hazen 58545 | (701) 748-2345 |
| Hazen Middle School 104 7th St Ne, Hazen 58545 | (701) 748-6649 |