San Mateo County Child Support Services Main Office
Redwood City, California
The San Mateo County Child Support Services Main Office is at 555 County Center, 2nd Floor, Redwood City, CA 94063. Call the Department of Child Support Services at (866) 901-3212, the statewide line. It serves San Mateo County.
How do I contact this office?
555 County Center, 2nd FloorRedwood City, CA 94063
- Phone
- (866) 901-3212 (statewide line)
- TTY
- (866) 399-4096
- Hours
- Lobby Monday to Thursday, 9:00 a.m. to 4:00 p.m. Lobby closed Friday (call center open 8:00 a.m. to 4:45 p.m., closed 12:00 to 1:00 p.m.).
- Before you go
- Lobby open for in-person drop-ins and appointments Monday to Thursday.
- smcdcss@smcgov.org
- Fax
- (650) 366-4711
- Official page
- Office page
Is this my office?
This office serves San Mateo County.
Not your area? See every California child support office.
Can I handle this without going in?
Often, yes. Many requests don't need a visit:
- Check your case and payments online in Customer Connect.
- Pay online, by phone, or by mail: see every way to pay child support in California.
- Ask about your case by phone at (866) 901-3212.
Going in person? Read "Before you go" above, and call first if you can.
Other child support offices near Redwood City
- Santa Clara County Department of Child Support Services San Jose · 21 miles away
- San Francisco Child Support Services at the Human Services Agency San Francisco · 22 miles away
- San Francisco Child Support Services at the Superior Court San Francisco · 23 miles away
More help with California child support
Office details come from the official California office listing, checked October 24, 2026. Sunny Child Support is not affiliated with the Department of Child Support Services. Spot a mistake? Tell us.