| Business | Phone |
| Lamar Elementary School 301 Alberta St, Lamar 72846 | (479) 885-3363 |
| Lamar High School 301 Elberta St, Lamar 72846 | (479) 885-3344 |
| Lamar Public School District 301 Elberta St, Lamar 72846 | (479) 885-3907 |
| Lamar Superintendents Office Elberta St, Lamar 72846 | (479) 885-3907 |
| Lamar Upper Elementary School 301 Elberta St, Lamar 72846 | (479) 885-6511 |