| Business | Phone |
| Williams Building Maintenance 205 E Broadway, Williston 58801 | (701) 572-1753 |
| Williams County Agriculture 205 E Broadway, Williston 58801 | (701) 572-1717 |
| Williams County Birth & Death 205 E Broadway, Williston 58801 | (701) 577-4520 |
| Williams County Courthouse 205 E Broadway, Williston 58801 | (701) 577-4500 |
| Williams County Extension Svc Po Box 1109, Williston 58802 | (701) 577-4595 |
| Williams County Narcotics Task Po Box 337, Williston 58802 | (701) 577-7711 |
| Williams County Passports Williston 58801 | (701) 577-4540 |
| Williams County Public Adm 205 E Broadway, Williston 58801 | (701) 577-4583 |
| Williams County Valuations 205 E Broadway, Williston 58801 | (701) 577-4555 |
| Williams County Veteran Svc 205 E Broadway, Williston 58801 | (701) 577-4550 |
| Williams Treasurer/Recorder 205 E Broadway, Williston 58801 | (701) 572-1740 |
| Williston Vector Control 1719 42nd St W, Williston 58801 | (701) 572-4044 |
| County Weed Control 631 2nd St E, Williston 58801 | (701) 572-4883 |
| Nw Youth Assessment Ctr 512 4th Ave E, Williston 58801 | (701) 577-7708 |