Contact Child Support

Toll free at 1-800-346-5437

The CSSD phone system allows individuals to receive general CSSD information, including payment and account balances, as well as the ability to speak to a case worker directly.  For all CSSD calls, please call 1-800-346-5437.

Below are links to lists of caseworkers and their email addresses for each regional office.

• Great Falls Regional Office Contact Information
  • This region contains Blaine, Cascade, Chouteau, Daniels, Glacier, Hill, Liberty, Petroleum, Phillips, Pondera, Ravalli, Roosevelt, Sheridan, Teton, Toole and Valley counties
• Billings Regional Contact Information
  • This region contains Big Horn, Carbon, Carter, Custer, Dawson, Fallon, Garfield, McCone, Musselshell, Powder River, Prairie, Richland, Rosebud, Treasure, Wibaux, and Yellowstone counties.
• Butte Regional Office Contact Information
  • This region contains Beaverhead, Broadwater, Deer Lodge, Fergus, Gallatin, Golden Valley, Granite, Jefferson, Judith Basin, Lewis and Clark, Madison, Meagher, Park, Powell, Silver Bow, Stillwater, Sweet Grass, and Wheatland counties.
• Missoula Regional Office Contact Information
  • This region contains Flathead, Lake, Lincoln, Mineral, Missoula and Sanders counties.
• Helena/Intergovernmental Regional Office Contact Information
  • This region contains incoming interstate cases for all counties in Montana.

Mailing Address

CSSD Central Mail Unit
PO Box 202943
Helena, MT 59620-2943

Fax Number

(406) 444-9626

Click the county on the map below for Regional Office Information.

Central Office

2550 Prospect Ave
PO Box 202943
Helena, MT 59620-2943
Toll-free: (800) 346-5437
Fax: (406) 444-1370

childsupport@mt.gov This email address is only intended for general questions about the child support program. For case related question please contact the caseworker directly.