Child Support in Washington County

Reviewed by Stephanie Green · Managing Partner & Co-Founder · Last updated June 11, 2026

Washington County, Ohio · Marietta

Washington County uses Ohio's statewide 2024 Income Shares Model — there is no county-specific formula. Where you file depends on your family: married or divorcing parents resolve support inside the divorce or dissolution at the General Division of the Court of Common Pleas, while never-married parents file in the Washington County Juvenile Court. Either way, the Washington County Child Support Enforcement Agency calculates, collects, and enforces the order, and any deviation from the guideline amount requires statutory findings.

How is child support set in Washington County, Ohio?

Run the official Ohio Child Support Computation Worksheet (2024 Income Shares) at ohiochildsupportcalculator.ohio.gov using both parents' gross incomes, parenting-time, health-insurance, and child-care numbers. Married or divorcing parents file the worksheet with the divorce or dissolution at the Washington County Court of Common Pleas; never-married parents file in the Washington County Juvenile Court before the paternity/support clerk, Morgan McCartney (ext. 2423). File the Application for Child Support Services so the Washington County CSEA, (740) 373-9324, can open a IV-D case. A deviation from the guideline amount requires the statutory 'unjust, inappropriate, not in the best interest' findings.

Ohio Child Support by the Numbers

2024 Year Ohio's updated Income Shares support schedule took effect Source: Ohio Revised Code § 3119.021
10% Change in the calculated amount that justifies a modification Source: Ohio Revised Code § 3119.79
3 years How often either parent can request an administrative review Source: Ohio Revised Code § 3119.60
Age 18 When support normally ends — or high-school graduation, whichever is later Source: Ohio Revised Code § 3119.86

What Counts in an Ohio Child Support Calculation

What the worksheet counts	Counts toward support?	Notes
Both parents' gross income	Yes	Wages, salary, commissions, bonuses, and self-employment earnings
Health insurance for the children	Yes	Credited to the parent who pays the premium
Work-related childcare	Yes	Daycare and after-school costs are added in
Parenting time	Yes	Adjustments apply for substantial or equal parenting time
Imputed income	Sometimes	Added when a parent is voluntarily unemployed or underemployed
A new spouse's income	No	Only the two parents' incomes are counted

Where to File: Washington County Court of Common Pleas

205 Putnam St, Marietta, OH 45750, Marietta, OH 45750
Phone: (740) 373-6623
Hours: Monday–Friday, 8:00 AM–4:00 PM
Website: washingtongov.org/269/Common-Pleas-Court---General-Division

Juvenile Branch (Never-Married Parents)

Washington County Juvenile Court
205 Putnam St, Marietta, OH 45750, Marietta, OH 45750
Phone: (740) 373-6623
Hours: Monday–Friday, 8:00 AM–4:00 PM

Child Support is the right path if…

You need to establish a first child-support order, or change an existing one.
You want an accurate guideline number from the official Ohio 2024 Income Shares worksheet.
You need the Washington County CSEA to collect and enforce support through wage withholding.
There's been a change in income, parenting time, health-insurance, or child-care costs.

Filing Fees

Support inside a DR case is part of the $350 deposit · motion to modify support $200 (no deposit for a CSEA-brought motion) · deviations need statutory findings · CSEA (740) 373-9324 · confirm amounts with the Clerk at (740) 373-6623

Forms & Filing Packets

Establishing a child-support order — Included with the DR case ($350) · new Juvenile case deposit set by that court

File with the divorce/dissolution (Common Pleas) or in the Juvenile Court for never-married parents. Include the official worksheet, the health-insurance affidavit, and a IV-D application.

Ohio Child Support Computation Worksheet (2024 Income Shares) — Run the official Ohio Child Support Calculator, print, and sign. Required any time the court sets or changes support.
Affidavit of Health Insurance (Washington County) — States who can provide health insurance for the children and at what cost — required whenever child support is at issue.
Application / Questionnaire for Child Support Services (IV-D) — Opens a IV-D case with the Washington County Child Support Enforcement Agency so it can calculate, collect, and enforce support. File whenever a support order is requested.
Parenting Proceeding Affidavit (UCCJEA · R.C. 3127.23) — Lists where each child has lived for the last 5 years and with whom, confirming Ohio's jurisdiction over custody under the UCCJEA. Required in any case involving minor children.

Modifying an existing child-support order — $200 motion to modify support (no deposit if CSEA brings it)

File a motion in the existing case (or request a CSEA administrative review) with an updated worksheet and current income proof. The modify-support deposit is $200.

Motion for Change of Child Support (Ohio SC Form 28) — The Ohio uniform motion to change child support, medical support, or the tax exemption after a change of circumstances. File in the division that issued the order.
Ohio Child Support Computation Worksheet (2024 Income Shares) — Run the official Ohio Child Support Calculator, print, and sign. Required any time the court sets or changes support.
Affidavit of Health Insurance (Washington County) — States who can provide health insurance for the children and at what cost — required whenever child support is at issue.

How to File Child Support in Washington County

Gather the numbers. Collect both parents' gross income, the parenting-time schedule, health-insurance premiums for the children, and work-related child-care costs.
Run the official worksheet. Use ohiochildsupportcalculator.ohio.gov to calculate the guideline amount under the 2024 Income Shares Model; print and sign it.
File in the right court. Married/divorcing parents file with the divorce or dissolution at the Court of Common Pleas; never-married parents file in the Washington County Juvenile Court. Include the Application for Child Support Services.
Address any deviation. If you're asking the court to deviate from the guideline figure, prepare the 'unjust, inappropriate, not in the best interest' findings and supporting evidence.
Let CSEA enforce it. Once journalized, the Washington County CSEA collects through wage withholding and enforces the order; ask CSEA about an administrative review for future changes.

Washington County Practice Notes

Statewide formula, county enforcement. Washington uses Ohio's 2024 Income Shares Model with no local variation. Run ohiochildsupportcalculator.ohio.gov, print, and sign the worksheet for filing. The Washington County CSEA, (740) 373-9324 (4th floor), opens the IV-D case, sets up wage withholding, and enforces collection.
No deposit for a CSEA-brought motion. When the Child Support Enforcement Agency files the motion to establish or modify support, there is no filing deposit. A privately filed motion to modify support takes a $200 deposit.
Deviations require findings. A deviation from the guideline amount must include the statutory 'unjust, inappropriate, not in the best interest' findings, supported by evidence the court can rely on.

Frequently Asked Questions

How is child support calculated in Washington County?: Washington County uses Ohio's statewide 2024 Income Shares Model — there is no county formula. Run the official worksheet at ohiochildsupportcalculator.ohio.gov using both parents' gross incomes, the parenting-time schedule, health-insurance premiums, and work-related child-care costs, then print and sign it. The Washington County Child Support Enforcement Agency, (740) 373-9324 (4th floor), opens the IV-D case, sets up wage withholding, and enforces collection. A deviation from the guideline amount requires statutory best-interest findings.
What is a IV-D application and why do I need one in Washington County?: A IV-D Application opens a child-support case with the Washington County Child Support Enforcement Agency (CSEA), (740) 373-9324. Once open, CSEA collects support through automatic wage withholding, distributes it to the receiving parent, and can enforce the order through license suspension, tax intercept, credit reporting, and contempt referrals. File the Application / Questionnaire for Child Support Services whenever a support order is established.
Where do unmarried parents file for custody, paternity, or support in Washington County?: At the Washington County Juvenile Court, 205 Putnam St., Marietta, before Hon. Timothy A. Williams (Magistrate Kyle Boker). The Juvenile Court keeps its own clerks: the custody clerk is Jill Roach (ext. 2421), and the paternity/support clerk is Morgan McCartney (ext. 2423). Complete the local juvenile packets in blue ink. Grandparent and other non-parent custody requests are always filed here, not in Probate.
How much does it cost to change a custody, parenting-time, or support order in Washington County?: Each post-decree motion — to change custody, modify child support, or modify visitation — takes a $200 deposit, and a counter-motion is $35. There is no deposit for a motion brought by the Child Support Enforcement Agency. Changing the residential parent requires a change in circumstances plus best-interest findings under R.C. 3109.04(E); adjusting only the schedule uses a best-interest standard; support changes need an updated worksheet. Confirm current amounts with the Clerk at (740) 373-6623.

Free Local Resources in Washington County

Washington County Clerk of Courts — Legal Division. Provides current filing fees, local forms, and filing instructions for custody, divorce, and dissolution cases. Call (740) 373-6623, ext. 2503 (Monday–Friday, 8:00 AM–4:00 PM), or visit https://washingtongov.org/269/Common-Pleas-Court---General-Division before filing to confirm deposits and packet requirements.
Washington County Child Support Enforcement Agency (CSEA). Washington County's IV-D agency, (740) 373-9324 (4th floor), opens child-support cases, runs wage withholding, distributes payments, and enforces orders. File a IV-D Application when establishing or modifying support.
"Successful Co-Parenting" Parenting Class — OSU Extension. The court-approved parenting-education class for parents with minor children, run by OSU Extension–Washington County. Meets the second Monday of each month, 3:00–5:00 p.m., at 1115 Gilman Ave., Marietta; $30 in exact cash; pre-register at (740) 376-7431. File the certificate before the final hearing.

Related to your child support case

Paternity & Custody — Establish parentage and build a parenting plan that protects your children.
Post-Decree Modification — Update custody, support, or parenting orders after your case ends.
Spousal Support — Pursue or respond to alimony requests during and after divorce.

Related guides

In-depth, attorney-written guides on child support and related Ohio family law topics.

Child Support Calculation in Ohio: How the Formula Works — Ohio calculates child support with the income shares model, combining both parents' incomes to set a shared obligation. Here's how the formula works and what changes the bottom line.
How to Modify Child Support in Ohio — Child support orders aren't permanent. When income or circumstances change substantially, Ohio lets you modify support — through a CSEA review or a court motion. Here's how.

Keep exploring

Ohio Child Support guide — Statewide overview of child support in Ohio.
Columbus family law — Local attorneys and courts serving the Columbus metro.
Meet Stephanie Green — Managing Partner & Family Law Attorney at Gavvl Law.
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Call (844) 694-2885 or email support@gavvl.com.