Child Support in Mariposa County, California

Mariposa County is best known as a gateway to Yosemite, and the court recently announced that electronic filing of court documents is now available. That matters if you thought a child support filing here still required a paper form delivered in person. The Superior Court of California, County of Mariposa is at 5088 Bullion Street, Mariposa, 95338, phone (209) 966-2005.

The Mariposa County Local Child Support Agency has its own office at 5101 Jones Street, close to the courthouse. It handles parentage establishment, guideline calculations, and collection or enforcement of support for county cases directly.

Family Code section 4055 sets the statewide rule, and Mariposa uses that rule. Both parents' net income and the parenting time split drive the number. The free calculator at childsupport.ca.gov/guideline-calculator can give you a working figure before you file a Request for Order (FL-300) with an Income and Expense Declaration (FL-150), now electronically or on paper, or ask the local agency to open a case.

If the filing fee is a hardship, the clerk can accept a Request to Waive Court Fees (FW-001) with either an electronic or in-person submission.

How child support is calculated in California

California sets child support with a statewide uniform guideline (Family Code section 4055) that applies the same way in Mariposa County as everywhere else. The formula is based mainly on two things:

1. Both parents' net disposable incomes.
2. The percentage of time the child spends with each parent (the timeshare).

The guideline amount is presumed to be correct, and courts use a calculator to run the numbers. Because the result depends on accurate income, the Income and Expense Declaration (Form FL-150) you file is what drives your number.

Where child support cases are handled in Mariposa County

Child support in Mariposa County is handled through the Superior Court of California, County of Mariposa, and the county's Local Child Support Agency, which is part of the California Department of Child Support Services. There are two common paths:

1. Either parent files a Request for Order (Form FL-300) with an Income and Expense Declaration (Form FL-150) inside a divorce, parentage, or custody case.
2. The Local Child Support Agency opens a case to establish, collect, and enforce support, often at no cost to the parents.

Because courthouse and local agency office details change over time, confirm current details using the official California Courts court finder:

Find the Mariposa County Superior Court (official California Courts finder)

Local notes for Mariposa County

Because e-filing is a newer option in Mariposa, the specific vendor has not been confirmed independently. Call (209) 966-2005 to get the current process before you assume a particular website works. Mariposa's rural geography means many residents travel a long distance to reach the county seat, so electronic filing could reduce courthouse trips once the details are confirmed.

The self-help resource, listed at mariposa.courts.ca.gov, can help self-represented parents identify which forms to file. Staff there will not tell you how your particular case will turn out, and exact hours are not posted online. It also has not been confirmed whether a commissioner or judge typically hears support matters in Mariposa.

Mariposa's population swells with visitors headed to Yosemite for much of the year. That does not change how a resident's child support case is handled. The courthouse, the local agency, and the statewide formula work the same in July as they do in January. Confirm which office is handling collections before you send a payment or a question to the wrong place.

Official child support resources in Mariposa County

Superior Court of California, County of Mariposa handles child-support filings, located at 5088 Bullion Street, Mariposa 95338. Phone: (209) 966-2005.

E-filing is available. The court has announced that electronic filing of documents is now available; confirm the current vendor with the clerk.

Mariposa County Self-Help Center / Family Law Facilitator (https://www.mariposa.courts.ca.gov/) can help with procedure and paperwork. Helps self-represented parents with forms and procedure; cannot give legal advice for your situation.

• Superior Court of California, County of Mariposa
• Mariposa County Self-Help / Family Law Facilitator
• Mariposa County Local Child Support Agency
• California Guideline Child Support Calculator
• Form FL-300 Request for Order
• Form FW-001 Request to Waive Court Fees

Local details reviewed August 2026. Offices and locations can change, so confirm with the official sites above before you file.

Mariposa County Child Support FAQs