Contra Costa County Department of Child Support Services
Martinez, California
The Contra Costa County Department of Child Support Services is at 50 Douglas Drive, Suite 100, Martinez, CA 94553. Call the Department of Child Support Services at (866) 901-3212, the statewide line. It serves Contra Costa County.
How do I contact this office?
50 Douglas Drive, Suite 100Martinez, CA 94553
- Phone
- (866) 901-3212 (statewide line)
- TTY
- (866) 399-4096
- Text
- (925) 268-8429
- Hours
- Monday to Friday, 8:00 a.m. to 4:30 p.m.
- Before you go
- Office open Monday to Friday, 8:00 a.m. to 4:30 p.m. Video chat is available during the same hours. Phones are answered until 4:45 p.m.
- childsupport@dcss.cccounty.us
- Fax
- (925) 335-3636
- Official page
- Office page
Is this my office?
This office serves Contra Costa 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.
What can I do at this office?
- Payment kiosk in the lobby
- Video chat
- Paternity, child support, and medical support orders
- Order modification and enforcement
Other child support offices near Martinez
- Napa County Department of Child Support Services Napa · 18 miles away
- Solano County Child Support Services Fairfield · 18 miles away
- San Francisco Child Support Services Main Office San Francisco · 21 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.