Is Parentage Automatic for Same-Sex Couples in Illinois?

 Posted on June 29, 2026 in Family Law

"Parentage" refers to the legal relationship of parents to their children. Whether a same-sex couple is assumed to be the legal parents of their children depends mostly on whether that couple is married or not. This is very similar to how the law treats parentage in heterosexual couples.

Even for married same-sex couples, however, there are some additional steps that are worth considering. These can reinforce the legal ties to any children. If you and your partner are wondering how you can ensure that Illinois law will recognize your relationship with your child in 2026, a Skokie, IL parentage lawyer can help.

How Does Illinois Establish Parentage for Married Same-Sex Couples?

Under the Illinois Parentage Act of 2015 (750 ILCS 46/204), spouses are automatically presumed to be the legal parents of any child born during their marriage. This is true of same-sex couples as well as heterosexual ones. No separate filing is required at birth to establish parentage in these cases. At birth, only the gestational or birth parent is automatically listed on the child’s birth certificate. The second parent can be added after parentage is established.

This presumption of parentage establishes legal standing for custody, parenting time, and decision-making authority if the couple later separates or divorces.

How Do Unmarried Same-Sex Couples Establish Parentage in Illinois?

Any woman who gives birth to a child is automatically recognized as that child’s legal parent. However, with couples who are not married, this leaves non-biological parents legally unbound to their child. When an unmarried couple has a child and wishes to establish parentage, they have several options.

Voluntary Acknowledgment of Parentage

One of the most common methods is a Voluntary Acknowledgment of Parentage (VAP). This is a document that is typically signed soon after the child’s birth. Once the rescission period expires, it has the legal effect of a judgment of parentage under 750 ILCS 46/309. However, it can still be challenged in limited circumstances, such as fraud, duress, or a material mistake of fact within the time allowed by law.

Court Order

Same-sex couples can also obtain a judgment of parentage from a court. If granted, the court will enter an order establishing parentage that is legally binding.

Second-Parent Adoption

Another option for a non-biological parent is to pursue a second-parent adoption. While it can be a process, this is one of the most secure ways of establishing a legal parent-child relationship. Once finalized, an adoption decree is highly final and difficult to challenge. It is generally treated as permanent except in rare situations, such as fraud or jurisdictional defects.

Couples also, of course, have the option of getting married before their child is born. This would typically make the presumption of parentage applicable.

Why Should Married Same-Sex Couples in Illinois Consider Second-Parent Adoption?

Second-parent adoption is often recommended even for some married couples. Married couples who might consider second-parent adoption include those who have a child through assisted reproduction or surrogacy. If there is any chance the family might eventually live in a state that does not recognize Illinois parentage law, adoption may also be a good choice.

A presumption of parentage may be challenged and rebutted in certain circumstances. This can be true even if a family remains within Illinois all their lives. Situations where this may come up include contested custody during a separation or divorce. The biological parent passing away may also result in challenges. In some cases, other family members have been known to try to challenge same-sex parentage.

An adoption decree generally cannot be successfully challenged, even in situations like this.

What Can Same-Sex Couples in Illinois Do to Protect Their Parentage Rights?

In cases of same-sex parentage, a proactive review of your options will help you maintain your legal rights to your child. While it may be difficult to think about worst-case scenarios regarding relationships to children, it is often more difficult and painful to deal with these issues later if they come up.

If you are unsure whether your family would benefit from second-parent adoption, an attorney with experience in same-sex family law can advise you about your situation.

Contact Our Chicago, IL Parentage Lawyer Today

The Skokie, IL LGBT family law attorney at The Law Offices of Curtis Bennett Ross, L.L.C. brings over 40 years of legal experience to every case, including those involving same-sex couples. Attorney Curtis Bennett Ross also has training as a mediator and can serve as a court-appointed guardian ad litem in cases involving children. We offer free, limited consultations. Call us at 312-984-1514 today to set up an appointment to review your situation.