Post Offices List in Mercer County, North Dakota:
| Beulah Post Office | 111 E Main St, Beulah, ND 58523 |
| Golden Valley Post Office | 13 Main St W, Golden Valley, ND 58541 |
| Hazen Post Office | 13 1st Ave Sw, Hazen, ND 58545 |
| Stanton Post Office | 119 Harmon Ave, Stanton, ND 58571 |
| Zap Post Office | 113 Main St, Zap, ND 58580 |