Child Support Services Division, Helena Intergovernmental Office
Helena, Montana · Region 8
The Child Support Services Division, Helena Intergovernmental Office is at 2550 Prospect Ave, Suite 400, Helena, MT 59601. Call Child Support Services Division (CSSD), Montana Department of Public Health and Human Services at (800) 346-5437, the statewide line. It serves Lewis and Clark County.
How do I contact this office?
2550 Prospect Ave, Suite 400Helena, MT 59601
Mail: CSSD Central Mail Unit, PO Box 202943, Helena, MT 59620
- Phone
- (800) 346-5437 (statewide line)
- Before you go
- An enrollment for services may be dropped off at any Child Support Services office regardless of where you live in Montana.
- childsupport@mt.gov
- Fax
- (406) 444-9626
- Official page
- Office page
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.
Is this my office?
This office serves Lewis and Clark County.
Not your area? See every Montana child support office.
Can I handle this without going in?
Often, yes. Many requests don't need a visit:
- Pay online, by phone, or by mail: see every way to pay child support in Montana.
- Ask about your case by phone at (800) 346-5437.
Going in person? Read "Before you go" above, and call first if you can.
What can I do at this office?
- Enrollment for services drop off
Other child support offices near Helena
- Child Support Services Division, Butte Office Butte · 48 miles away
- Child Support Services Division, Great Falls Office Great Falls · 71 miles away
- Child Support Services Division, Missoula Office Missoula · 99 miles away
More help with Montana child support
Office details come from the official Montana office listing, checked October 18, 2026. Sunny Child Support is not affiliated with Child Support Services Division (CSSD), Montana Department of Public Health and Human Services. Spot a mistake? Tell us.