| Business | Phone |
| Columbia Cnty Supreme Justice 401 Union St # 20, Hudson 12534 | (518) 828-3079 |
| Columbia County 911 85 Industrial Tract, Hudson 12534 | (518) 828-1263 |
| Columbia County Board-Election 401 State St, Hudson 12534 | (518) 828-3115 |
| Columbia County Central Svc 401 State St, Hudson 12534 | (518) 828-2031 |
| Columbia County Commissioners 401 Union St, Hudson 12534 | (518) 828-0753 |
| Columbia County Community Hlth 71 N 3rd St, Hudson 12534 | (518) 828-8472 |
| Columbia County Computer Office 560 Warren St, Hudson 12534 | (518) 822-0721 |
| Columbia County Ems 610 State St, Hudson 12534 | (518) 828-1267 |
| Columbia County Family Courts 401 Union St, Hudson 12534 | (518) 828-0315 |
| Columbia County Fire Crdntr 610 State St, Hudson 12534 | (518) 822-8610 |
| Columbia County Handicap Svc 71 N 3rd St, Hudson 12534 | (518) 828-4278 |
| Columbia County Highway Garage 179 State Route 23b, Hudson 12534 | (518) 828-1114 |
| Columbia County Motor Vehicle 560 Warren St, Hudson 12534 | (518) 828-3350 |
| Columbia County New Leaf Club 71 N 3rd St, Hudson 12534 | (518) 828-2363 |
| Columbia County New Leaf Club Fairview Plz, Hudson 12534 | (518) 828-2363 |
| Columbia County Personnel Dept 401 State St, Hudson 12534 | (518) 822-8610 |
| Columbia County Pub Defender 610 State St, Hudson 12534 | (518) 828-3410 |
| Columbia County Public Info 401 State St, Hudson 12534 | (518) 828-2825 |
| Columbia County Stenographer 401 Union St, Hudson 12534 | (518) 828-0429 |
| Columbia County Stop Dwi 401 State St, Hudson 12534 | (518) 828-0052 |
| Columbia County Supervisor's 401 State St, Hudson 12534 | (518) 828-1527 |
| Columbia County Surrogate's 401 Union St, Hudson 12534 | (518) 828-0414 |
| Columbia County Youth Bureau 401 State St, Hudson 12534 | (518) 828-7213 |