| Business | Phone |
| O'Brien County Assessor's Ofc 155 S Hayes Ave, Primghar 51245 | (712) 957-3205 |
| O'Brien County Attorney's Ofc 155 S Hayes Ave Fl 3, Primghar 51245 | (712) 957-2965 |
| O'Brien County Auditor's Ofc 155 S Hayes Ave, Primghar 51245 | (712) 957-3225 |
| O'Brien County Bridge Shop 140 5th St Ne, Primghar 51245 | (712) 957-4210 |
| O'Brien County Engineer's Ofc 155 S Hayes Ave, Primghar 51245 | (712) 957-3425 |
| O'Brien County General Relief 155 S Hayes Ave, Primghar 51245 | (712) 957-5985 |
| O'Brien County Isu Ext 340 2nd St Se, Primghar 51245 | (712) 757-5045 |
| O'Brien County Janitor's Ofc 155 S Hayes Ave, Primghar 51245 | (712) 957-3235 |
| O'Brien County Maintenance Shp 140 5th St Ne, Primghar 51245 | (712) 957-4215 |
| O'Brien County Motor Vehicle 155 S Hayes Ave, Primghar 51245 | (712) 957-4185 |
| O'Brien County Recorder's Ofc 155 S Hayes Ave, Primghar 51245 | (712) 957-3045 |
| O'Brien County Veteran's Affr 155 S Hayes Ave, Primghar 51245 | (712) 757-0031 |