Columbia County Child Support Agency

Portage, Wisconsin

The Columbia County Child Support Agency is at 400 DeWitt Street, Portage, WI 53901. Call the office at (608) 742-9610. It serves Columbia County.

How do I contact this office?

400 DeWitt Street
Portage, WI 53901
Mail: P.O. Box 256, Portage, WI 53901
Get directions Call (608) 742-9610
Phone
(608) 742-9610
TTY
(877) 209-5209
Hours
Monday to Friday, 8:00 a.m. to 4:30 p.m.
Before you go
Office hours and walk in policies are set by each county or tribal agency. Several agencies ask you to call ahead or schedule an appointment to see your case specialist.
Email
child.support@columbiacountywi.gov
Official page
Office page

Is this my office?

This office serves Columbia County.

Not your area? See every Wisconsin child support office.

Can I handle this without going in?

Often, yes. Many requests don't need a visit:

Going in person? Read "Before you go" above, and call first if you can.

Other child support offices near Portage

More help with Wisconsin child support

Office details come from the official Wisconsin office listing, checked October 18, 2026. Sunny Child Support is not affiliated with Wisconsin Department of Children and Families, Bureau of Child Support. Spot a mistake? Tell us.