Modifying Orders After Your Knox County Decree

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

Knox County, Ohio · Mount Vernon

Life changes after a divorce — incomes shift, children's needs change, and parents move. In Knox County, the Domestic Relations Division keeps continuing jurisdiction over the orders it entered, and each kind of change (custody, parenting time, or support) has its own legal standard.

How do I modify a custody or support order in Knox County, Ohio?

File a post-decree motion in the case that issued the order and pay the $300 deposit (label it in the caption under the case number — Rule 27.4). To change custody, you must show a change in circumstances since the last order AND that modification is in the child's best interest (R.C. 3109.04(E)). Parenting time is modified on the best-interest standard alone. Child support is modified under R.C. 3119.79 (generally a 10%+ change), or through a CSEA administrative review. A parent who plans to move must file a Notice of Intent to Relocate (R.C. 3109.051(G)).

Ohio Custody by the Numbers

Best interest The single standard that governs every Ohio custody decision Source: Ohio Revised Code § 3109.04
No set age There is no age a child can choose a parent — the judge weighs a mature child's wishes Source: Ohio Revised Code § 3109.04(B)
Change in circumstances Required, plus a best-interest finding, before the residential parent can be changed Source: Ohio Revised Code § 3109.04(E)(1)
Shared parenting Either parent may ask the court for a joint parenting plan Source: Ohio Revised Code § 3109.04(G)

Compare Types of Custody in Ohio

Custody type	Who makes major decisions	Where the child lives	Best when
Shared parenting	Both parents jointly, under a written plan	Time is split per the plan (not always 50/50)	Parents can communicate and cooperate on decisions
Sole legal & residential	One parent	Primarily with that parent	One parent is unable or unwilling to co-parent
Split custody	Each parent for the child in their care	Siblings are divided between the two homes	Rare — only when it serves each child's best interest
Legal custody to a non-parent	The relative or caregiver granted custody	With the non-parent caregiver	Neither parent can safely care for the child

Where to File: Knox County Court of Common Pleas — Domestic Relations Division

111 East High Street, 2nd Floor, Mount Vernon, OH 43050
Phone: (740) 393-6777
Hours: Monday–Friday (confirm current hours with the Clerk of Courts at (740) 393-6788)
Website: co.knox.oh.us/common-pleas/

Juvenile Branch (Never-Married Parents)

Knox County Probate & Juvenile Court
111 East High Street, 1st Floor, Mount Vernon, OH 43050
Phone: (740) 393-6798
Hours: Monday–Friday (confirm current hours with the court at (740) 393-6798)

Post-Decree Modifications is the right path if…

You already have a Knox County decree or order and need to change custody, parenting time, or support.
For custody: circumstances have genuinely changed since the last order, and a change serves the child's best interest.
For support: a recalculation would shift the amount by at least 10% (R.C. 3119.79).
You're prepared to file the post-decree motion and label it correctly in the caption (Rule 27.4).

Filing Fees

$300 post-decree motion (DR) + computerization fees · $200 reopen in the Probate & Juvenile Court · CSEA administrative review available for support. Confirm current amounts with the Clerk at (740) 393-6788.

Forms & Filing Packets

Modify custody or parenting time — $300 post-decree motion

File a motion to reallocate parental rights (change in circumstances + best interest, R.C. 3109.04(E)) or to adjust parenting time (best interest). Label the motion in the caption (Rule 27.4).

Parenting Proceeding / UCCJEA Affidavit (Ohio Uniform Affidavit 3, Knox-hosted) — Required in any case with minor children. Lists where each child has lived for the last 5 years, confirming Ohio's UCCJEA jurisdiction over custody.
Knox County Domestic Relations Rules of Court (Amended 8/9/2023) — The local DR rules — including Rule 7.10.1 (emergency/ex parte orders and the Immediate Hearing Request), Rule 8 (temporary orders + Standard TRO), Rule 16 (Knox County Parenting Schedule), and Rule 27.4 (post-decree caption labeling).
Representing Yourself in Court — Knox County guide — The court's plain-language guide for self-represented filers — what the Clerk can and cannot help with, and how a DR case moves.

Modify child support — $300 post-decree motion

File a motion to change support under R.C. 3119.79 (generally a 10%+ change), or request a CSEA administrative review.

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.
Apply for Child Support Services (Title IV-D) — Knox County CSEA — Opens a IV-D child-support case with Knox County Child Support Services. Once opened, CSEA establishes/collects support by income withholding and can enforce it. Phone (740) 397-7177 ext. 3040 or (800) 298-2223.

How to File Post-Decree Modifications in Knox County

Identify the right standard. Custody reallocation needs a change in circumstances plus best interest (R.C. 3109.04(E)); parenting time needs best interest; support needs a 10%+ change (R.C. 3119.79).
Prepare the motion and worksheet. Draft the post-decree motion and, for support, a fresh Ohio Child Support Worksheet; for custody, include the Parenting Proceeding Affidavit.
File and label it correctly. File in the case that issued the order, pay the $300 deposit, and label the motion in the caption under the case number (Rule 27.4).
Handle relocation separately. If you intend to move, file a Notice of Intent to Relocate (R.C. 3109.051(G)); the other parent can request a hearing on whether the move serves the child's best interest.

Knox County Practice Notes

Custody changes face a high bar. The court will not change a prior custody decree unless there has been a change in circumstances of the child or residential parent since the last order AND modification is in the child's best interest (R.C. 3109.04(E)). Adjusting only the parenting-time schedule uses a best-interest standard and does not require a change in circumstances.
Label post-decree motions in the caption. Under DR Rule 27.4, post-decree motions must be clearly identified in the caption just under the case number, or the motion may be dismissed. Changing a child's school-placement designation in a shared-parenting case is a separate administrative request — not the same as changing custody.

Frequently Asked Questions

How do I change custody after my Knox County divorce?: File a post-decree motion to reallocate parental rights in the Domestic Relations case. The court will not change a prior custody decree unless there has been a change in circumstances of the child or residential parent since the last order AND modification is in the child's best interest (R.C. 3109.04(E)) — a high standard. The deposit is $300, and post-decree motions must be clearly labeled in the caption just under the case number (Rule 27.4) or they may be dismissed. (Adjusting only the parenting-time schedule uses a best-interest standard and does not require a change in circumstances.)
How do I change child support in Knox County?: File a motion to modify support under R.C. 3119.79 — generally, a recalculation must show at least a 10% change from the existing order (or another qualifying basis). The post-decree motion deposit in the Domestic Relations Division is $300. Knox County Child Support Services can also conduct an administrative review of an existing order through the CSEA.
What do I have to do before moving with my child in Knox County?: A residential parent who intends to move must file a Notice of Intent to Relocate with the court (R.C. 3109.051(G)). The court sends notice to the other parent, who may request a hearing on whether the move — and any change to the parenting schedule — is in the child's best interest. Filing the notice does not by itself change custody or parenting time.
How do I enforce a Knox County support or parenting-time order?: File a Motion to Show Cause (the standard contempt motion) in the case that issued the order. The court issues a show-cause order and sets a hearing; remedies under R.C. 2705.02/2705.031 can include a purge condition, make-up parenting time, attorney fees, and, for willful violations, jail. The post-decree motion deposit is $300, and the motion must be labeled in the caption under the case number (Rule 27.4).
What does the Knox County CSEA do, and do I need a IV-D application?: Knox County Child Support Services (the CSEA) is the IV-D agency that establishes, collects, and enforces child support. Filing a IV-D Application opens a support case so CSEA can set support under Ohio's guidelines, collect by automatic income withholding, distribute payments, and enforce orders through wage withholding, license suspension, tax intercept, and contempt referrals. Reach CSEA at (740) 397-7177 ext. 3040 or (800) 298-2223.

Free Local Resources in Knox County

Knox County Clerk of Courts (Domestic Relations). Where divorce, dissolution, legal-separation, and post-decree filings are made — 117 East High Street, Suite 201, Mount Vernon, (740) 393-6788. The Clerk confirms current deposits and packet requirements; the Fee Schedule (effective 9/26/2025) and DR Rules are posted at https://co.knox.oh.us/common-pleas/.
Knox County Probate & Juvenile Court. Hears never-married parentage, custody, support, and non-parent custody, plus adoption — 111 East High Street, 1st Floor, Mount Vernon, (740) 393-6798. New parentage/custody/support case $300; reopen $200. Local rules at https://knoxpjcourt.com/.
Knox County Child Support Services (CSEA). The IV-D agency that establishes, collects, and enforces child support by income withholding. Apply for services at https://co.knox.oh.us/jfs/child-support/ or call (740) 397-7177 ext. 3040 or (800) 298-2223.
Parenting Wisely seminar. The court-ordered parenting-education seminar for any divorce, dissolution, legal separation, or annulment with minor children — about 2 hours, $30 cash or money order payable to the Knox County Treasurer, due within 45 days of filing (DR Rule 12).
Ohio Child Support Calculator. Run the official Ohio 2024 Income Shares child-support worksheet at https://ohiochildsupportcalculator.ohio.gov/ before any case that sets or changes support.

Related to your modifications case

Child Support — Calculate, establish, or modify support under Ohio's guidelines.
Paternity & Custody — Establish parentage and build a parenting plan that protects your children.
Spousal Support — Pursue or respond to alimony requests during and after divorce.

Related guides

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

Post-Decree Modifications in Ohio: Changing Your Order After Divorce — Your divorce decree isn't carved in stone. When life changes, Ohio lets you modify custody, parenting time, and support — but each requires meeting a specific legal standard. Here's how.
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.
Contempt Motions in Ohio Family Court: Enforcing Your Order — When the other parent ignores a court order — withholding the children or refusing to pay support — a contempt motion is how Ohio courts enforce it. Here's how the process works.

Keep exploring

Ohio Post-Decree Modifications guide — Statewide overview of post-decree modifications in Ohio.
Columbus family law — Local attorneys and courts serving the Columbus metro.
Meet Stephanie Green — Managing Partner & Family Law Attorney at Gavvl Law.
Payment plans & financing — Flat fees with Gavvl Direct, Affirm, Klarna, or PayPal Pay Later.

Call (844) 694-2885 or email support@gavvl.com.