| Business | Phone |
| Downs Inc 1002 9th Ave, Langdon 58249 | (701) 256-2447 |
| Du Bois Oil Corp 9742 Dresden Rd, Langdon 58249 | (701) 256-5957 |
| Erling's Oil Co 511 4th Ave, Langdon 58249 | (701) 256-2276 |
| Hoffarth Oil Co 10337 Highway 5, Langdon 58249 | (701) 256-5113 |