Eastern Sierra Child Support Services, Mammoth Lakes Office

Mammoth Lakes, California

The Eastern Sierra Child Support Services, Mammoth Lakes Office is at 1290 Tavern Road, Mammoth Lakes, CA 93546. Call the Department of Child Support Services at (866) 901-3212, the statewide line. It serves Mono County.

How do I contact this office?

Mono County Building, Tioga Room, 2nd Floor
1290 Tavern Road
Mammoth Lakes, CA 93546
Phone
(866) 901-3212 (statewide line)
TTY
(866) 399-4096
Hours
Tuesday and Thursday, 9:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:00 p.m., or by appointment
Before you go
Open to visitors on Tuesday and Thursday during office hours; other times by appointment.
Fax
(916) 520-8191
Official page
Office page

Spanish speaking caseworkers available.

Is this my office?

This office serves Mono 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:

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

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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.