Contact Child Support 

All child support cases are worked out of one of the following regional offices. Click on the links below for a list of caseworkers and contact information for each office. 

• Great Falls Regional Office Contact Information
  • This region contains Blaine, Cascade, Chouteau, Daniels, Glacier, Hill, Liberty, Petroleum, Phillips, Pondera, 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, Ravalli, and Sanders counties.
• Helena/Interstate Regional Office Contact Information
  • This region contains incoming interstate cases for all counties in Montana.

Mailing Address 

Interactive Voice Response Unit (IVRU)

You can call the IVRU to connect you directly to your case worker. The IVRU can be reached at (406) 444-9855 or at 1-800-346-5437. You will need to know your CSSD case number and/or your social security number and your date of birth when calling the IVRU.

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

Central Office

2401 Colonial Drive, First Floor
PO Box 202943
Helena, MT 59620-2943
(406) 444-6856
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.