Understanding the Basics of Annulment in Illinois

 Posted on February 11, 2026 in Annulments

When a marriage falls apart, it’s easy to assume divorce is the only option for undoing it. But in some situations, Illinois law allows a marriage to be treated as though it never happened at all.

This is called an annulment. If you are wondering whether your marriage qualifies under 2026 laws, a Naperville annulment attorney can review your situation and explain your options. Understanding the difference between annulment and divorce is a good place to start.

What Is the Difference Between a Divorce and an Annulment in Illinois?

A divorce ends a valid marriage. An annulment declares that the marriage was never legally valid in the first place. After an annulment, the marriage is treated by the law as though it never happened.

Illinois does not use the word "annulment" in its statutes. Instead, the state calls this process a Declaration of Invalidity of Marriage. The end result is the same: the marriage is wiped out legally.

Some people also pursue annulments through their church or religious community. For example, according to an authoritative Catholic information website, "A Church annulment…is an ecclesiastical judicial act whereby what was believed to be a canonically valid marriage is declared not to have been one in the first place." This is similar to a legal annulment, but makes it so the marriage never happened in the eyes of the church.

It is important to understand that a religious annulment has no legal effect. Only a court can grant a legal annulment in Illinois. If you need your marriage to be legally invalid, you must go through the court process.

What Are the Legal Grounds for an Annulment in Illinois?

Not everyone qualifies for an annulment. Under Section 301 of the Illinois Marriage and Dissolution of Marriage Act (750 ILCS 5/301), there are a limited number of reasons a court will grant one. If your situation does not qualify, divorce or legal separation is your only path forward.

The qualifying grounds include:

Lack of Consent or Mental Capacity

If one spouse was unable to understand or agree to the marriage due to a mental condition, intoxication, or drug use at the time of the ceremony, the marriage can be invalidated.

Likewise, if the marriage took place under false pretenses, that can be grounds for annulment if it materially affected the other spouse’s ability to knowingly consent to the marriage. For example, if one spouse only married to obtain immigration benefits or hid a serious issue, the marriage may qualify for annulment.

Inability to Consummate the Marriage

If one spouse was incapable of being physically intimate and the other did not know about this before they were married. This is a historical part of the law, but not used very often in modern courts.

Prohibited Marriage

Some marriages are illegal under Illinois law. If one spouse was already legally married to someone else at the time of the ceremony, the second marriage is "bigamous" and can be annulled. Marriages between close relatives are also prohibited.

Underage Without Property Consent

Illinois law requires people to be 18 or older to marry without needing consent from their parents. Those aged 16 or 17 may marry only with parental consent and court approval. If a minor marries without meeting these requirements, the marriage can be invalidated.

Is an Annulment Better Than a Divorce in Illinois?

That depends on your circumstances. An annulment is not automatically a faster or easier process than a divorce. Because very few marriages qualify for annulment, you must be able to prove that your situation meets one of the legal requirements listed above. If you cannot, a divorce is still a valid and legal way to end your marriage.

One reason some people prefer an annulment is personal or religious significance. Some religions treat legally invalid marriages differently than divorce. Other people want an annulment because of how marital property is handled (the legal approach to property in an annulment can be different from a standard divorce). Speaking with a family law attorney before deciding which path to take can keep you from misunderstanding the law, which can save time and frustration.

One thing to note: children born during a marriage that is later annulled are still considered legitimate under Illinois law. Their rights to child support and inheritance are not affected by the annulment.

Call a DuPage County Annulment Attorney Today

When annulments are an option, the process needs careful preparation and a clear understanding of the law. The Naperville divorce planning lawyers at Pesce Law Group, P.C. have nearly two decades of experience helping Illinois families navigate complex family law matters.

If you are considering an annulment for your marriage, call Pesce Law Group, P.C. at 630-352-2240 today for a free consultation.