How to File for Divorce in Cook County

Updated on March 24, 2026
Updated: March 24, 2026

Ending a marriage can feel overwhelming. Many people come to us with questions about the Illinois divorce process and what steps they need to take to move forward. If you are thinking about filing for divorce in Illinois, understanding the process can help you feel more prepared and confident.

At Tommalieh Law, our divorce attorneys regularly help individuals and families in Cook County navigate divorce cases in the Illinois courts. Whether you are just learning how to file for divorce in Illinois or preparing to submit your Illinois divorce papers, having the right information can make the process easier.

In this guide, we explain how to file for divorce in Illinois, what documents you may need, and what to expect as your case moves through the court system. If you need guidance or legal support, contact us today. Our team at Tommalieh Law is ready to help.

Understanding Divorce in Illinois

divorce papers and a gavel on a desk

In the state of Illinois, divorce is legally called a dissolution of marriage. The rules for divorce are set out in the Illinois Marriage and Dissolution of Marriage Act, which was passed by the Illinois General Assembly and applied by the Illinois courts.

Illinois Is a No-Fault Divorce State

Illinois uses a no-fault divorce system. This means that a spouse does not need to prove wrongdoing in order to end a marriage.

Most divorces are based on irreconcilable differences, which means the marriage has broken down and cannot be repaired. Courts generally accept this reason when couples decide their relationship cannot continue.

Residency Requirements

Before filing for divorce in Illinois, at least one spouse must have lived in the state of Illinois for at least 90 days.

In most situations, the case is filed in the county where one spouse lives. For residents of Cook County, divorce cases are handled by the local circuit court.

Where to File for Divorce in Cook County

Divorce cases in Cook County are handled by the Domestic Relations Division of the circuit court.

When you file for divorce in Illinois, the case becomes a civil case in the court system. The court will address important issues such as:

  • Child custody
  • Child support
  • Spousal support
  • Property division
  • Division of marital property
  • Responsibility for marital debts

Most divorce filings today are submitted electronically. The county clerk helps maintain court records and filing information.

Residents who need assistance can often find guidance through court self-help centers, which provide resources and customer service for individuals completing court documents.

The Divorce Filing Process in Cook County

The first official step in the Illinois divorce process is submitting the documents that start the case.

Filing the Petition for Dissolution of Marriage

The case begins when one spouse files a petition for dissolution of marriage with the court. This document tells the court that one spouse is requesting a divorce.

The petition for dissolution of marriage typically includes:

  • Basic information about the marriage
  • Requests related to child custody or parenting responsibilities
  • Requests related to child support or spousal support
  • A request for the court to divide marital property and marital debts

Once this petition is filed, the court assigns a case number, and the divorce case officially begins.

The Cook County court system provides access to domestic relations forms, including documents for filing a dissolution of marriage with or without children.

Notifying Your Spouse

A woman and a man looking distressed in a law office

After the petition is filed, the other spouse must be notified about the case. This process is called service of process.

The purpose of service is to ensure the other spouse knows about the divorce and has the opportunity to respond.

The Other Spouse’s Response

After receiving notice, the other spouse may respond to the petition and participate in the case.

Some couples agree on most issues, while others may disagree on matters such as finances, parenting, or property division. The court process helps resolve these issues.

Issues That Must Be Resolved in a Divorce

Every divorce requires the court or the parties to resolve several important issues before the case can be finalized.

Division of Property and Debts

The court divides assets and debts according to Illinois law. This process involves determining what property is considered marital property and how marital debts will be handled.

Courts aim for a fair property division based on each spouse’s financial situation and contributions to the marriage.

A financial affidavit is often required to provide detailed information about income, expenses, assets, and debts.

Parenting Responsibilities and Parenting Time

If a couple has children, the court must decide issues related to child custody and parenting responsibilities.

Judges focus on the best interests of the child when making decisions about parenting time and responsibilities.

In some situations, the court may refer parents to mediation or services through conciliation court to help resolve disagreements.

Child Support

an attorneys desk with a child support order on it

Illinois uses guidelines to determine child support payments. These guidelines consider both parents’ income and the needs of the child.

The goal is to ensure children receive the financial support they need after a divorce.

Spousal Maintenance (Alimony)

In some cases, the court may order spousal support, also known as maintenance.

Maintenance of spousal support may be awarded depending on factors such as the length of the marriage and each spouse’s financial circumstances.

Resolving the Divorce Case

Not every divorce goes to trial. Many cases are resolved through discussions and agreements between the spouses.

Negotiation and Settlement

Spouses may negotiate agreements regarding finances, parenting arrangements, and property division. If both parties agree, the court may approve the agreement without a trial.

Mediation

In some cases, mediation is used to help spouses resolve disputes. This process can be especially helpful when parents disagree about child custody or parenting arrangements.

Court Hearings

If issues cannot be resolved through negotiation or mediation, the court may schedule hearings where a judge makes decisions. These hearings may also involve additional court costs depending on the motions filed or proceedings required.

During the case, attorneys may file motion forms to request temporary orders or address specific issues before the final decision.

Finalizing the Divorce

A divorce becomes final when the court enters a judgment of dissolution of marriage.

This final order legally ends the marriage and outlines the court’s decisions about:

  • Child custody
  • Child support
  • Spousal support
  • Property division
  • Allocation of marital property
  • Responsibility for marital debts

Once the judgment of dissolution of marriage is entered, both spouses must follow the terms of the order.

In some situations, couples may qualify for a joint simplified dissolution of marriage, which is a streamlined process for certain uncontested cases.

Learn More: How long does it take to get a divorce in Illinois?

When to Consider Speaking with a Divorce Lawyer

attorney mediating discussion between two individuals

Some people begin the process of filing for divorce in Illinois on their own, using Cook County, Illinois divorce forms and information provided by the courts. However, many divorce cases involve complex issues.

You may want to consider speaking with a lawyer if your case involves:

  • Disputes about child custody
  • Questions about child support
  • Concerns about spousal support
  • Complicated property division
  • Division of marital property
  • Responsibility for marital debts

Legal guidance can also be important in situations involving domestic violence or requests for protective orders under the Domestic Abuse Act.

Divorce cases also involve important paperwork, including Illinois divorce papers, financial affidavit documents, and requests submitted through motion forms. A lawyer can help ensure these documents meet the requirements of the Illinois courts.

How Tommalieh Law Can Help

At Tommalieh Law, we understand that divorce is both a legal process and a personal transition. Our attorneys work closely with individuals and families in Cook County to guide them through every stage of the Illinois divorce process.

Our team helps clients with:

  • Preparing the petition for dissolution of marriage
  • Completing required Illinois divorce forms
  • Organizing financial documents like a financial affidavit
  • Addressing issues involving child custody, child support, and spousal support
  • Navigating the Domestic Relations Division of the court system

Because we regularly work within the Illinois courts, we understand the procedures established by the Supreme Court, the Supreme Court Commission, and local court systems.

Our goal is to make the process as clear and manageable as possible while protecting your rights and interests.

Getting Help with Your Cook County Divorce

Learning how to file for divorce in Illinois is an important first step toward resolving legal and financial issues after the end of a marriage. The process involves filing the correct documents, addressing important matters like child custody, child support, property division, and possible court costs, and following the procedures required by the Illinois courts.

If you are considering filing for divorce in Illinois or have questions about the Illinois divorce process, you do not have to go through it alone.

At Tommalieh Law, we help individuals and families throughout Cook County understand their options and move through the legal system with confidence. Contact Tommalieh Law today to learn how our team can assist you with your divorce and help you take the next step forward.

Frequently Asked Questions

How long does the divorce process take in Illinois?

The length of the Illinois divorce process depends on whether the case is contested or uncontested. Some uncontested divorces may be completed in a few months, while cases involving disputes about property division, child custody, or child support may take longer.

Do both spouses have to agree to get a divorce in Illinois?

No. Illinois is a no-fault divorce state. A divorce can be granted based on irreconcilable differences even if one spouse does not want the divorce.

How is property divided in an Illinois divorce?

Illinois courts divide marital property using an equitable distribution system. This means property and marital debts are divided fairly based on factors such as each spouse’s financial situation and contributions to the marriage.

How is child custody decided in Illinois?

Illinois courts make decisions about child custody based on the best interests of the child. Judges consider several factors, including the child’s needs, the parents’ relationship with the child, and the ability of each parent to provide a stable environment.

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