Child Support Enforcement Agencies by State: Directory
Every U.S. state and territory operates a designated child support enforcement agency funded and regulated under Title IV-D of the Social Security Act (42 U.S.C. §§ 651–669b). These agencies form the operational backbone of the national child support system, handling order establishment, income withholding, and collections across jurisdictional lines. Understanding how these agencies are structured, what authority they hold, and when they become involved is essential reference knowledge for parents, legal practitioners, and researchers navigating child support proceedings. This page covers the statutory framework, agency functions, common engagement scenarios, and the boundaries that define when state enforcement applies versus federal or tribal authority.
Definition and scope
Child support enforcement agencies at the state level are government entities created by statute to administer the Title IV-D program, a federal-state partnership that obligates each state to provide support services as a condition of receiving federal matching funds. The Office of Child Support Services (OCSS), a division of the Administration for Children and Families (ACF) within the U.S. Department of Health and Human Services (HHS), oversees state agency compliance and distributes federal funds.
Each state designates a single IV-D agency — often called the Department of Child Support Services, Division of Child Support Enforcement, or Bureau of Child Support — though the naming varies by jurisdiction. As of the federal fiscal year framework established under 45 C.F.R. Part 301, every state must maintain a state plan approved by OCSS, operate a statewide automated data system, and meet performance benchmarks measured by the federal Office of Management and Budget.
The scope of these agencies covers four core functions under federal law:
- Paternity establishment — legally identifying the child's father when unmarried parents are involved (see paternity establishment)
- Order establishment — obtaining a legally enforceable child support order through administrative or judicial process (see child support order establishment)
- Order modification — adjusting existing orders when circumstances change materially (see modification standards)
- Enforcement — collecting payments through income withholding, tax intercept, license suspension, passport denial, and other mechanisms (see enforcement mechanisms)
Agencies serve both custodial and noncustodial parents upon application, and enrollment is mandatory for families receiving Temporary Assistance for Needy Families (TANF) (see child support and TANF).
How it works
State child support agencies operate through a combination of administrative authority and coordination with family courts. The process follows a defined sequence:
- Case opening — A custodial parent, noncustodial parent, or public benefits agency submits an application. Families receiving TANF are automatically referred; others pay an application fee not to exceed $25 (45 C.F.R. § 302.33).
- Locate services — The agency uses the Federal Parent Locator Service (FPLS), operated by OCSS, to find noncustodial parents through employment records, financial data, and state databases.
- Paternity establishment — Where paternity is unestablished, the agency facilitates genetic testing or voluntary acknowledgment (voluntary acknowledgment of paternity).
- Order establishment or registration — The agency either obtains an administrative order (in states with that authority) or refers the case to a court.
- Income withholding — Upon order establishment, an income withholding order is issued to the employer. Federal law under 42 U.S.C. § 666(b) requires immediate income withholding in all IV-D cases.
- Payment processing — Payments flow through the State Disbursement Unit (SDU), a centralized clearinghouse required in every state under 42 U.S.C. § 654b.
- Enforcement escalation — When income withholding fails, agencies deploy tax refund intercept (tax refund intercept), credit bureau reporting, license suspension, and passport denial for arrears exceeding $2,500 (22 C.F.R. § 51.60(a)(4)).
Interstate cases are governed by the Uniform Interstate Family Support Act (UIFSA), adopted in all 50 states, which determines which state holds continuing exclusive jurisdiction over an order (see UIFSA interstate enforcement).
Common scenarios
Scenario 1 — Single-state case with employed noncustodial parent. Both parents reside in the same state, and the noncustodial parent has a W-2 employer. The state IV-D agency opens a case, issues a support order administratively or through the court, and forwards an income withholding order to the employer. The employer remits directly to the SDU. This is the most straightforward case type and accounts for the majority of collections nationally, with income withholding generating the largest share of total collections reported annually by OCSS in its Child Support Enforcement Data report.
Scenario 2 — Interstate case with parents in different states. The custodial parent resides in State A; the noncustodial parent lives in State B. Under UIFSA, State A typically initiates a referral to State B's IV-D agency as the responding state. The initiating state forwards documentation; the responding state takes enforcement action under its own procedures while applying the controlling order's terms.
Scenario 3 — Self-employed noncustodial parent. Income withholding to an employer is not available. The agency may seek direct payments through the SDU, pursue liens on business assets, or request a bond. Self-employed parent child support cases often require additional income investigation and may involve imputed income analysis (imputed income).
Scenario 4 — Arrears accumulation with public benefits intersection. When a noncustodial parent accumulates arrears and the custodial parent receives TANF, a portion of collected arrears is retained by the state as reimbursement. The allocation between state and family follows rules under 45 C.F.R. Part 302, and families receive only arrears collected above the assigned support debt. Child support arrears rules distinguish between state-owed and family-owed debt.
Scenario 5 — Noncustodial parent receiving Social Security benefits. The Social Security Fairness Act of 2023, enacted January 5, 2025, repealed the Windfall Elimination Provision (WEP) and Government Pension Offset (GPO), which previously reduced Social Security benefits for individuals who also received certain public-sector pensions. The repeal applies to benefits payable on or after January 5, 2025. Noncustodial parents who worked in public-sector employment — such as certain government, educational, or public safety positions — and who also receive Social Security benefits may see materially increased monthly benefit amounts as a result. Because Social Security benefits are generally treated as income for child support purposes, this increase may constitute a substantial change in circumstances supporting an order modification. State IV-D agencies may need to account for adjusted benefit amounts when computing income available for support in both new and existing cases. Affected parents should notify their state agency or legal counsel promptly to assess whether an order review is warranted (modification standards).
Scenario 6 — Tribal child support programs. Federally recognized tribes may operate their own IV-D programs under direct grants from OCSS rather than routing through the state agency. Tribal child support programs operate under tribal law but must meet federal requirements in 45 C.F.R. Part 309.
Decision boundaries
Not every child support matter falls within state agency jurisdiction, and the boundaries between agency authority, court authority, and federal involvement are defined by specific criteria.
State IV-D agency vs. private legal action. Parents who have never received public benefits and choose not to apply for IV-D services may pursue child support establishment and enforcement entirely through private counsel in family court. In that scenario, no state agency involvement is required. The state agency enters only when an application is filed or TANF enrollment triggers automatic referral. For an overview of attorney roles in either context, see child support attorney roles.
Administrative vs. judicial orders. Not all states have administrative order authority. States without it must route all order establishment through a court. States with administrative authority — including Texas, California, and Florida — can issue orders without a court filing, though either party may request a judicial hearing. The administrative track is faster but subject to appeal (child support appeals process).
Federal prosecution threshold. State agencies handle civil enforcement. When a noncustodial parent willfully fails to pay support for a child living in another state and the arrears exceed $5,000, or when nonpayment extends beyond one year across state lines, the Deadbeat Parents Punishment Act (18 U.S.C. § 228) authorizes federal criminal prosecution by the Department of Justice. This is a hard threshold: below it, the matter stays at the state level.
Social Security income and the Social Security Fairness Act of 2023. Enacted January 5, 2025, the Social Security Fairness Act of 2023 repealed the Windfall Elimination Provision (WEP) and Government Pension Offset (GPO). These provisions had previously reduced Social Security benefits for individuals who also received pensions from employment not covered by Social Security, such as certain state, local government, or federal civil service positions. The repeal is effective for benefits payable on or after January 5, 2025, and the Social Security Administration is in the process of implementing retroactive benefit adjustments for affected individuals. For child support purposes, Social Security benefits — including retirement, disability (SSDI), and dependent benefits payable to a child on a noncustodial parent's record — are generally treated as income subject to withholding. The elimination of WEP and GPO reductions may materially increase a noncustodial parent's Social Security income. This increase can constitute a substantial change in circumstances warranting modification of an existing support order. State IV-D agencies apply their respective state income definitions when computing support; practitioners should verify how each state's guidelines treat Social Security income increases resulting from this statutory change. Affected parties with existing orders should promptly consult their state agency or legal counsel to evaluate whether a modification petition is appropriate (modification standards).
International cases. When the noncustodial parent resides outside the United States, the state IV-D agency initiates an international referral. Countries with reciprocal arrangements under the Hague Convention on the International Recovery of Child Support follow a treaty-based process; countries without such arrangements require direct diplomatic or private legal action. OCSS maintains the list of foreign reciprocating countries under [42 U.S.C. § 659a](https://uscode.house.gov/view.xhtml?req=gran