Montana Child Support Office Locations

Montana has 5 child support offices. Find the one for your county below, or check the official Montana office directory.

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All Montana child support offices

Not sure which office is yours? Call Montana child support at (800) 346-5437.

CSSD says an enrollment for services may be dropped off at any of its offices regardless of where you live in Montana. Call 1-800-346-5437 before visiting.

Child Support Services Division, Billings Office(official office page, opens in a new tab)

Region 3

1500 Poly Drive, Suite 200
Billings, MT 59102
Mail: CSSD Central Mail Unit, PO Box 202943, Helena, MT 59620

Serves: Big Horn County, Carbon County, Carter County, Custer County, Dawson County, Fallon County, Garfield County, McCone County, Musselshell County, Powder River County, Prairie County, Richland County, Rosebud County, Treasure County, Wibaux County, Yellowstone County

Visiting: An enrollment for services may be dropped off at any Child Support Services office regardless of where you live in Montana.

  • Enrollment for services drop off
Fax
(406) 655-5545
Email
childsupport@mt.gov

Mail documents to the CSSD Central Mail Unit, not to this address.

Directions

Child Support Services Division, Butte Office(official office page, opens in a new tab)

Region 4

129 W Park Street, Suite 201
Butte, MT 59701
Mail: CSSD Central Mail Unit, PO Box 202943, Helena, MT 59620

Serves: Beaverhead County, Broadwater County, Deer Lodge County, Fergus County, Gallatin County, Golden Valley County, Granite County, Jefferson County, Judith Basin County, Lewis and Clark County, Madison County, Meagher County, Park County, Powell County, Silver Bow County, Stillwater County, Sweet Grass County, Wheatland County

Visiting: An enrollment for services may be dropped off at any Child Support Services office regardless of where you live in Montana.

  • Enrollment for services drop off
Fax
(406) 782-7928
Email
childsupport@mt.gov

Mail documents to the CSSD Central Mail Unit, not to this address.

Directions

Child Support Services Division, Great Falls Office(official office page, opens in a new tab)

Region 2

201 1st Street S, Suite 1A
Great Falls, MT 59405
Mail: CSSD Central Mail Unit, PO Box 202943, Helena, MT 59620

Serves: Blaine County, Cascade County, Chouteau County, Daniels County, Glacier County, Hill County, Liberty County, Petroleum County, Phillips County, Pondera County, Ravalli County, Roosevelt County, Sheridan County, Teton County, Toole County, Valley County

Visiting: An enrollment for services may be dropped off at any Child Support Services office regardless of where you live in Montana.

  • Enrollment for services drop off
Fax
(406) 454-3106
Email
childsupport@mt.gov

Mail documents to the CSSD Central Mail Unit, not to this address.

Directions

Child Support Services Division, Helena Intergovernmental Office(official office page, opens in a new tab)

Region 8

2550 Prospect Ave, Suite 400
Helena, MT 59601
Mail: CSSD Central Mail Unit, PO Box 202943, Helena, MT 59620

Serves: Lewis and Clark County

Visiting: An enrollment for services may be dropped off at any Child Support Services office regardless of where you live in Montana.

  • Enrollment for services drop off
Fax
(406) 444-9626
Email
childsupport@mt.gov

Region 8 handles incoming interstate cases for all Montana counties; cases within Lewis and Clark County are assigned to the Butte office. Mail documents to the CSSD Central Mail Unit, not to this address.

Directions

Child Support Services Division, Missoula Office(official office page, opens in a new tab)

Region 5

2675 Palmer Street
Missoula, MT 59808
Mail: CSSD Central Mail Unit, PO Box 202943, Helena, MT 59620

Serves: Flathead County, Lake County, Lincoln County, Mineral County, Missoula County, Sanders County

Visiting: An enrollment for services may be dropped off at any Child Support Services office regardless of where you live in Montana.

  • Enrollment for services drop off
Fax
(406) 329-5458
Email
childsupport@mt.gov

Mail documents to the CSSD Central Mail Unit, not to this address.

Directions

Which Montana child support office handles my case?

Each office serves specific counties. Search for yours above to find its office.If you are not sure where your case is handled, call (800) 346-5437 and they can point you to the right office.

Do I need to visit an office in person?

Usually not. Most questions can be handled by phone or online, and many offices see visitors by appointment. Call ahead before visiting to confirm hours and whether you need an appointment.

How do I contact Montana child support?

Run by Department of Public Health and Human Services (DPHHS), Child Support Services Division (CSSD)

Questions about your case or opening a case

Questions about payments

Our Montana child support guide covers payments, checking your case, and more.

Office details come from official Montana government sources (dphhs.mt.gov) and were last checked October 18, 2026. Each office links to its official listing. Sunny Child Support is not affiliated with any government agency.

Child support offices in other states