Pet Custody Laws in Illinois: What Happens to Your Pet in a Divorce

Deciding who keeps the family pet can be one of the most emotionally charged moments in any divorce. For many couples, a dog or cat represents years of shared memories, daily routines, and genuine companionship — not a piece of furniture to be divided like a dining room table.

Illinois has recognized this reality and updated its laws to reflect it. If you are going through a divorce or separation in Illinois and are worried about what happens to your pet, understanding the legal framework can help you make informed decisions and protect your relationship with your animal. This guide walks you through how Illinois law handles pet custody, what courts consider, and what steps you can take right now.

How Illinois Law Classifies Pets in a Divorce

Under Illinois law, pets are traditionally classified as property, which means they are subject to the same legal treatment as personal possessions like a car or furniture. This classification can complicate matters during a divorce or separation because the pet does not have the same legal status as a child, for whom custody and visitation rights can be established.

Under Illinois law, pets are legally classified as personal property. However, a 2018 amendment to the Illinois Marriage and Dissolution of Marriage Act added important clarity: courts can now consider the well-being of companion animals when deciding who keeps the pet — particularly when the animal was acquired during the marriage.

The new Illinois law does not actually go as far as to shift the legal basis of the determination from ownership to custody. Pets remain property under Illinois law. The court awards ownership of the pet, not custody or visitation. That said, the 2018 amendment meaningfully changed how courts approach the question.

Key Insight: The legal term used in Illinois statutes is “companion animal,” not “pet.” This distinction matters because the law applies specifically to companion animals that qualify as marital assets — not all animals a couple owns.

Not every animal owned by a couple or by one spouse falls under the new provision. The statutory provision applies only to companion animals that are deemed marital property. A pet owned by one spouse separately — such as a dog the wife owned prior to the marriage — is not subject to allocation of ownership under the statute. The statute also specifically excludes service animals as defined by section 2.01c of the Humane Care for Animals Act.

Pets acquired during the marriage and cared for by both spouses are considered marital property. Conversely, if a pet was owned by one spouse before the marriage or received as a gift, it may be considered non-marital property and typically remains with that spouse.

The specific provisions may not cover pets such as reptiles, birds, or small mammals for companion animals. Ownership of those animals may be determined based on general property division principles rather than considering the pet’s well-being. If you share an exotic or non-traditional animal with your spouse, you may want to review how exotic pet laws work across the United States for broader context on how these animals are treated legally.

Does Illinois Consider the Pet’s Best Interest

A new law was created in Illinois in 2018, where the court can consider the “well-being” of the pet in question. The law is an addition to the Illinois Marriage and Dissolution of Marriage Act, or 750 ILCS §5/503(n). This law states that if the court finds that a companion animal of the parties is a marital asset, it shall allocate the sole or joint ownership of and responsibility for a companion animal of the parties.

In issuing an order under this subsection, the court shall consider the companion animal’s well-being. As used in this section, “companion animal” does not include a service animal as defined in Section 2.01c of the Humane Care for Animals Act. Considering a pet’s well-being is not unlike the method courts use when deciding a custody issue of children in a divorce, otherwise generally referred to as the “best interests” test.

However, there is an important nuance worth understanding. Unlike the allocation of parental responsibilities, pet custody in Illinois is not based on the pet’s “best interests” in the formal legal sense. If one spouse can demonstrate that they have been mainly responsible for the daily care and well-being of the pet — including feeding, grooming, and providing medical care — the court is more likely to award ownership to that spouse.

Important Note: Service animals are explicitly excluded from the 2018 law. Even if a service animal was acquired during the marriage and both spouses cared for it equally, the animal remains the sole property of the person it assists.

Judges consider the pet’s overall well-being, including physical health and emotional stability. The person most involved in daily care and bonding with the pet is given significant consideration. This means your day-to-day involvement with your pet — walks, vet visits, feeding, training — carries real legal weight in an Illinois courtroom.

How Illinois Courts Decide Who Gets the Pet

Judges have the discretion to award sole or joint ownership, taking into account the pet’s well-being and its caretaking history. The court will assess factors such as when the pet was acquired, who primarily cared for it, and the specific needs of the animal to determine ownership.

Courts in Illinois weigh several practical factors when making this determination:

• Who adopted or purchased the pet — the court generally considers who bought or adopted the pet and whether it was a joint decision or whether one party adopted the animal before the relationship began.
• Daily care and responsibility — this includes feeding, exercising, and paying for veterinary services. Courts may look at which party was more involved in the pet’s daily life.
• Emotional bond — if one person has a stronger emotional attachment to the pet, this could influence the court’s decision.
• Financial capacity — who has the means to properly care for the pet, both financially and logistically, including considerations like living space, time available for care, and ability to meet the pet’s needs.
• Living arrangements — if one party lives in the suburbs with a yard and one lives in a city apartment, a dog’s interests may best be served by living where the dog can have freedom of movement.
• Children’s attachment — if children are attached to the pets, it may be best to keep the pets where the children spend the majority of their time.

Custody of a pet is generally awarded to the person who took responsibility for caring for the pet. For example, if a couple adopted a dog during their marriage, but the husband walked the dog every morning and was financially responsible for the dog’s care, then the husband would likely be awarded sole custody of the pet after the dissolution of the marriage.

Pro Tip: If you are already in the middle of a divorce, avoid taking the pet without a court order or filing a false report about mistreatment. It will ultimately damage your case to file a false report or attempt to steal or abscond with the pet.

Like both child custody and property division, pet ownership can be allocated on a temporary basis while the divorce is pending. The process for making this determination is much like the process for entering temporary orders regarding any other aspect of the case. This means a judge can decide who lives with the pet during the divorce proceedings — not just at the end.

Illinois also gives law enforcement a role in extreme situations. The law says “nothing shall prohibit a law enforcement officer from taking temporary custody of a dog or cat … that is exposed in a manner that places the dog or cat in a life-threatening situation for a prolonged period of time,” and allows police officers to remove any dog or cat from an unsafe environment at their discretion. Understanding how animal laws intersect with daily life — such as how Illinois handles neighbor disputes involving cats — can give you a broader picture of how the state approaches animal welfare.

Can You Get Joint Custody of a Pet in Illinois

With the enactment of the 2018 amendment to the Illinois Marriage and Dissolution of Marriage Act, family courts are now permitted to award joint or sole custody of a pet — known to the courts as a “companion animal” — that was obtained during the marriage and is considered a marital asset.

Under the new Illinois law, divorcing couples can request joint custody for their pets, and judges can decide on joint custody without a request if they feel this is in the best interest of the pet. This is a significant shift from the pre-2018 framework, when there was no such thing as “pet custody” in the state of Illinois; instead, one person was simply awarded sole possession of the animal. So-called “custody arrangements” were occasionally created between parties to a divorce but had no binding authority in the eyes of the court.

That said, joint ownership comes with real practical challenges. The issue with joint ownership is that it can lead to post-decree litigation — one of the joint owners taking the other to court for additional rights or enforcement of a right — so the courts tend only to want to have one sole owner of the pet post-divorce. Furthermore, if there is joint ownership of the pet, there will most likely be a court order allocating financial responsibilities for the pet. Depending on the individual facts and circumstances, the court could also enter an order for the visitation of the pet.

Common Mistake: Assuming joint pet custody works the same way as joint child custody. Courts approach these very differently. Pet ownership arrangements lack the same formal enforcement mechanisms as child custody orders, which can make violations harder to address after the divorce is finalized.

Joint pet custody arrangements can work for some couples, especially if their pet is resilient and easy-going enough to handle splitting time between two different houses. However, this arrangement will not work well for pets that need more stability in their routines and surroundings. In these cases, it is better to designate one party as the primary caretaker and allow the other party to act as a pet sitter to spend time with the pet.

While Illinois does not have specific laws that define visitation rights or joint custody for pets, it is becoming more common for judges to make arrangements that allow pet owners to share time with their pets. For example, a pet might spend half the week with one owner and the other half with the other, or visitation might be arranged on weekends or holidays. Pet custody agreements can even outline specifics such as who is responsible for veterinary visits, who will take care of the pet in case of travel, and how the animal will be transported between households.

What Happens to Pets for Unmarried Couples in Illinois

If you and your partner were never married, the legal picture looks very different. If you are unmarried or already divorced, Illinois divorce law no longer governs the pet issue. Instead, a replevin action may be necessary. This is a legal claim to recover personal property, and you will need clear proof of ownership — such as vet bills, microchip registration, or a purchase agreement.

In Illinois, unmarried individuals are legally considered to be single. That means that all personal property that an individual has when he or she enters a relationship, including pets, belongs to him or her when the relationship ends. The 2018 amendment to the Illinois Marriage and Dissolution of Marriage Act simply does not apply to unmarried couples.

Common law marriage was outlawed in Illinois in 1905. Common law marriage is a situation where a couple lives together as husband and wife despite not actually being legally married. In some states, referring to each other as spouses, filing joint tax returns, and otherwise maintaining the illusion of being married is considered to be a common law marriage, which gives unmarried couples some of the same rights as married couples. Illinois does not extend those rights.

This creates a significant gap in legal protection for unmarried pet owners. The law considers pets property, so if you are cohabiting, you will want to address what happens to pets in a cohabitation agreement, including details about whether someone brought the pet into the relationship or if you plan on acquiring a pet later.

A cohabitation agreement is one practical solution. Similar to a prenuptial agreement, a cohabitation agreement spells out how a cohabitating, unmarried couple will split up their assets if the union is terminated. For unmarried individuals who have no other legal remedy to protect their interests in Illinois should a relationship end, a cohabitation agreement provides a mechanism to divide property in an equitable manner.

Important Note: The state of Illinois does not offer any legal protection if you are cohabitating and the two of you break up. Without a written agreement, whoever holds documented proof of ownership — the adoption papers, microchip registration, or purchase receipt — is likely to prevail in a dispute.

Domestic violence situations are a separate consideration for unmarried couples as well. The Illinois Domestic Violence Act of 1986 allows a judge to award temporary legal custody of a pet to one spouse or partner if it can be proven that the domestic abuse towards the spouse or partner is also a danger to the animal. This protection applies regardless of marital status in qualifying circumstances.

How to Protect Your Rights to a Pet Before or During Divorce in Illinois

Whether your divorce is just beginning or you are still in the planning stages, there are concrete steps you can take to strengthen your position regarding your pet. The earlier you act, the better your documentation will be.

Document Your Role as Primary Caretaker

If you are considering divorce and are concerned that your spouse will try to take the pet, you should begin gathering evidence of your heavy involvement in your pet’s daily life and care. Any kind of documentation will help. It can include photographs, videos, and receipts — any proof of your heavy involvement with and care for your pet. This documentation will be used to show that you are the pet’s primary caretaker.

Gather all relevant documents, including veterinary records, training and obedience certifications, and any evidence of your involvement in the pet’s care. Receipts for food, grooming, medication, and vet visits all serve as evidence of ongoing financial and physical responsibility.

Consider a Pet Custody Agreement

Divorcing parties can also reach their own agreements outside of court regarding pet custody, expenses, and care, which the court can approve. Settling the matter between yourselves — rather than leaving it to a judge — gives you far more control over the outcome and reduces the stress on your pet.

Divorcing couples can reach an agreement on how to handle their pet without court intervention, including sole ownership, joint ownership, or a schedule for the pet to live with each spouse. The agreement should outline a visitation schedule, detail how ongoing costs will be shared or who will cover them, specify the process for resolving disagreements, and consider adding a clause for what happens if one of the owners can no longer care for the pet.

Agreements should use terms like “ownership,” “responsibility,” and “care,” rather than “custody” or “visitation,” to avoid future disputes or enforceability issues.

Use a Prenuptial or Postnuptial Agreement

If you are not yet married and are considering a prenuptial agreement, it is always possible to include the issue of pet custody and visitation in the prenuptial agreement, so feel free to have your family law attorney include a plan for any pets in the document.

Addressing your pet in a prenup or postnup removes the question from the court’s hands entirely. You and your spouse define the outcome on your own terms, in writing, before any conflict arises. This is especially valuable if one of you owned the pet before the marriage and wants to ensure it remains non-marital property.

Consult an Expert If the Case Is Complex

Engaging with veterinarians or pet behaviorists can strengthen your case by providing professional insights into your pet’s needs. In contested situations, a neutral expert who can speak to your pet’s routine, health, and emotional stability may carry significant weight with a judge.

It might also be possible to bargain for custody of your pet by giving up another marital asset your former spouse wants. This kind of negotiated trade can resolve the issue without ever going before a judge — and often results in a more stable outcome for the animal.

Pro Tip: If you have children, consider whether keeping the pet with the children’s primary residence makes sense. It has been shown that it is actually better for the pet to keep them in their familiar surroundings with their established routines. And if you have children, it might be best for them to keep their pets close to them.

Know Your Rights If You Are Unmarried

If you are not married, your strongest protection is written documentation of ownership. Keep adoption papers, microchip registration records, and vet bills in your name. If you and your partner share a pet and you have no written agreement, whoever has the clearest paper trail of ownership is likely to prevail.

You may also want to explore how animal laws in your area affect your day-to-day responsibilities as a pet owner. For example, understanding Illinois roadkill laws or Illinois backyard chicken laws can help you stay on the right side of state regulations while caring for your animals. If you own dogs, reviewing dog leash laws in Illinois is also worthwhile, as responsible ownership documentation can support your case in a custody dispute. Pet owners in other states going through similar situations can find relevant guidance on Ohio dog laws, Michigan dog laws, or Florida dog laws for their respective states.

Illinois pet custody law has evolved considerably since 2018, and it continues to develop as more cases work their way through the courts. Pet custody in Illinois is still in its early stages when compared to child custody, but it is becoming more apparent that animals are often an integral part of family life. By understanding how the courts approach pet custody and taking steps to document your relationship with your pet, you can help ensure that your companion is treated with the care and respect they deserve, no matter what changes come to your family. If your situation is complex or contested, speaking with an experienced Illinois family law attorney is always the wisest next step.