Adult adoption in Ohio is available only in five specific situations set by statute, and if your circumstances fit one of them, the case runs through the probate court in the adoptive parent’s county and ends in a decree that legally makes the adoptee the petitioner’s child. Ohio does not allow any two consenting adults to enter an adoption, which is where most people’s expectations part ways with the law.
Who Qualifies to Be Adopted as an Adult
Under Ohio Revised Code 3107.02, an adult (18 or older) may be adopted only if one of these applies:1Ohio Legislative Service Commission. Ohio Revised Code 3107.02 – Who May Be Adopted
- The adult has a total or permanent disability.
- The adult has been determined to have a developmental disability as defined by Ohio law.
- The adult had a foster child–foster caregiver, kinship caregiver, or stepchild–stepparent relationship with the petitioner while the adult was still a minor, and the adult consents.
- At the time of the adult’s eighteenth birthday, the adult was in the permanent custody of, or in a planned permanent living arrangement with, a public children services agency or private child placing agency, and the adult consents.
- The adult is the child of the petitioner’s spouse, and the adult consents.
If none of those fits, Ohio probate courts have no authority to grant the adoption. There is no residual “any two adults who agree” category.
Who Can Petition
The petitioner side is broader. Ohio allows adoption by a married couple (at least one of whom is an adult), by an unmarried adult, or by a married adult acting alone in certain circumstances, such as when the other spouse is the biological parent and consents, or when the spouses are legally separated.2Ohio Legislative Service Commission. Ohio Revised Code 3107.03 – Who May Adopt
Filing the Petition
File the petition in the probate court of the county where the adoptive parent lives. It follows the general format of a civil action and must identify both the petitioner and the person to be adopted. Written consent from the adult being adopted is a required attachment at filing.3Butler County Probate Court. Butler County Probate Court – Instructions for an Adult Adoption
For cases based on foster, kinship, or agency custody, the petitioner must also give the court the name and contact information of the relevant agency so the court can verify the qualifying relationship.1Ohio Legislative Service Commission. Ohio Revised Code 3107.02 – Who May Be Adopted
Filing Fees
Fees are set county by county. Butler County charges a $118 deposit at filing; Warren County lists its adult adoption fee at $95. Call the probate clerk in your county before filing to confirm the current amount and accepted payment methods. Most courts take cash, checks, or money orders but not credit cards.3Butler County Probate Court. Butler County Probate Court – Instructions for an Adult Adoption
No Home Study
Adult adoption does not require a home study or prefinalization assessment. Ohio’s home study statute applies to a person seeking to adopt a minor, and the prefinalization assessment provisions likewise cover minor adoptions. Because both parties are competent adults consenting voluntarily, the court skips the investigation that would be standard for placing a child.
The Hearing
After the petition and supporting documents are filed, the court sets a hearing. Both the petitioner and the adult adoptee are generally expected to appear in person, though the court can excuse either. The judge reviews the petition, confirms that a qualifying category is met, and verifies that the adoptee’s consent is informed and voluntary. If everything checks out, the court issues a final decree of adoption.
These hearings are typically brief. There is no adversarial proceeding, no caseworker testimony, and no guardian ad litem. The court’s role is to confirm the statutory prerequisites, not to weigh competing interests.
What the Decree Changes Legally
Once the decree is final, Ohio law treats the adopted adult as a “legitimate blood descendant” of the adoptive parent for virtually all legal purposes. The adoptee gains the same legal standing as a biological child for inheritance, benefits, and family law.4Ohio Legislative Service Commission. Ohio Revised Code 3107.15 – Effect of Final Decree
Biological Family Ties Are Cut Off
Unless the adoption is by a stepparent (where the other biological parent remains in the picture), the adoption terminates all legal relationships between the adopted person and their biological family. Under the effect-of-adoption statute, the adoptee becomes “a stranger to the adopted person’s former relatives for all purposes including inheritance.” Biological parents lose parental rights, and the adoptee loses inheritance rights from the biological side.4Ohio Legislative Service Commission. Ohio Revised Code 3107.15 – Effect of Final Decree
In a stepparent adoption, the relationship with the spouse’s side of the family remains intact, but the other biological parent’s rights and the adoptee’s inheritance rights from that side are still cut off.
Name Change and Birth Certificate
The decree can authorize a name change for the adoptee. After the decree, the adoptee can request an updated birth certificate reflecting the adoptive parent’s name, which then replaces the original for most identification purposes. Social Security records, a driver’s license, and a passport are updated separately using the decree and new birth certificate.
Health Insurance
Under the Affordable Care Act, health plans offering dependent coverage must extend it to children up to age 26, and plans cannot restrict coverage based on financial dependency, marital status, school enrollment, or residency. An adopted adult under 26 may qualify for coverage on the adoptive parent’s plan under those federal rules.5U.S. Department of Labor. Young Adults and the Affordable Care Act: Protecting Young Adults and Eliminating Burdens on Businesses and Families FAQs
The Inheritance Catch You Need to Know About
Inheritance is often the reason people pursue adult adoption, and there is a limitation in Ohio law that trips people up. If the adoptive parent dies without a will, the adult adoptee inherits under Ohio’s intestacy laws just like any other child.4Ohio Legislative Service Commission. Ohio Revised Code 3107.15 – Effect of Final Decree
But when it comes to wills, trusts, and other documents that use class terms like “children,” “grandchildren,” “heirs,” “issue,” or “next of kin,” people adopted at 18 or older are not automatically included. To be covered by such a gift, the document must either name the adopted person specifically or expressly state that it covers people adopted at 18 or older.4Ohio Legislative Service Commission. Ohio Revised Code 3107.15 – Effect of Final Decree
The practical consequence: a grandparent’s trust leaving money to “my grandchildren” would not automatically include an adult adoptee unless the trust addresses adult adoptees expressly. Anyone considering adult adoption for inheritance reasons should review the relevant family wills and trusts with an attorney before filing.
Reversing an Adult Adoption
Treat the decree as permanent. Ohio has no specific statutory process for revoking an adult adoption, so anyone seeking to reverse one must go through general civil litigation. The most viable grounds involve fraud, coercion, or serious misrepresentation. Courts have also seen challenges from third parties, such as biological family members, when an adoption interferes with a pre-existing trust or estate plan. Each contest is evaluated on its own facts, success is not guaranteed, and the proceedings are expensive and slow. Anyone going forward with an adult adoption should assume the decree will stand.