Adult Adoption in Oregon: Consent, Process, and Effects

Adult adoption in Oregon lets any person petition a circuit court to become the legal parent of someone who is at least 18 or legally married, creating a parent-child relationship with the same legal force as a biological one. The process runs under ORS 109.329 and is noticeably lighter than adopting a minor: no home study, no placement report, often no hearing. The tradeoff is that the judgment carries real consequences for inheritance and family ties that are easy to miss going in.

Who Can File and Who Must Consent

Any adult can petition. Oregon does not require the petitioner to be older than the person being adopted or related to them in any way. The person being adopted must be at least 18, or legally married if younger.¹

At least one petitioner or the person being adopted must have lived in Oregon continuously for the six months before filing, and the petition goes to the circuit court in the county where that qualifying person resides.¹

Both the petitioner and the adoptee file separate written consents. Each consent must state that the person understands what adoption means and is signing voluntarily, without pressure or coercion.² If the petitioner is married, the court can require notice to the petitioner’s spouse, but the statute does not require the spouse to join the petition or sign a consent.¹

What to File and What It Costs

The core package is a Petition for Adoption and the adoptee’s written Consent to Adopt, with full legal names, dates of birth, and documentation of the six-month residency. The Oregon Judicial Department publishes statewide forms that every circuit court accepts, and local courts may have their own supplemental forms.³

If the adoptee wants a new name, that request goes into the petition itself. The court handles it alongside the adoption and includes it in the final judgment, so a separate name-change case is not necessary.⁴

Adult adoptions under ORS 109.329 do not require a home study, a placement report, or any professional evaluation of the home. Those requirements live in the statutes governing minor adoptions and simply do not apply here. That is the main reason the adult process moves faster and costs less.

Oregon’s 2026 circuit court fee schedule sets the adoption filing fee at $263.⁵ That amount is set by ORS 21.135(3)(a) and applies statewide.⁶

How the Court Decides

A judge reviews the paperwork once it is filed. A hearing is not automatic. The statute lists holding a hearing as one of several things the court may do, not something it must do, so when the petition, consents, and supporting documents are complete and raise no concerns, many judges finalize the adoption on the papers alone.¹

The standard is not “best interest,” which belongs to minor adoptions. For an adult adoption, the court must be satisfied that it has confirmed the identity and relationships of the parties, that each petitioner understands what adoption means, that no one is acting under duress, and that the adoption is “fit and proper.”¹ When the judge signs the judgment, the legal parent-child relationship takes effect that day.

What Changes About the Biological Parent Relationship

This is the part people most often underestimate. Under ORS 109.041, a judgment of adoption makes the adopted person the legal child of the adoptive parents and ends the legal parent-child relationship with the biological parents. After the adoption, the law treats the adopted person as if they had been born to the adoptive parents and had never been born to the biological ones.⁷

One exception matters: when a stepparent adopts, the adoptee keeps the legal relationship with the biological parent who is married to or in a domestic partnership with the adoptive stepparent. The same exception applies when that biological parent has died and the surviving parent later remarries.⁷

In practical terms, an adult who is adopted loses legal standing as the child of their biological parents for things like intestate inheritance, medical decision-making, and next-of-kin status. Biological parents can still name the adoptee in a will or trust, but automatic statutory rights disappear.

Inheritance Effects

Under ORS 112.175, adopted people are treated identically to biological children of the adoptive parents for intestate succession. If an adoptive parent dies without a will, the adoptee inherits the same share any biological child would, and the adoptive parent’s relatives take from and through the adoptee as though the blood tie had always been there.⁸

The other side of that rule: the adoptee stops being treated as the child of anyone except the adoptive parents, so the automatic right to inherit from biological parents who die intestate goes away. The stepparent exceptions carry over here too.⁸

Trusts and wills written by third parties can get messy. When a document leaves property to someone’s “children” or “issue” as a group, courts have at times resisted letting an adult adoptee claim a share, particularly where the adoption looks designed mainly to redirect inheritance. If estate planning is part of why you are considering the adoption, talk to an attorney about how the judgment will interact with any existing instruments in the adoptive family.

What Adult Adoption Does Not Do

Several benefits people associate with adoption do not follow from an adult judgment, and it is worth knowing before you file.

Immigration is the big one. The state adoption is valid, but federal immigration law treats it differently. U.S. Citizenship and Immigration Services recognizes an “adopted child” for petitioning purposes only when the adoption occurred before the adoptee turned 16, with a narrow sibling exception up to age 18 if another sibling was adopted by the same parents before 16. A citizen can petition for an adopted son or daughter who is 21 or older, but only if that person previously qualified as an adopted child under those age rules. Adopting someone for the first time as an adult does not meet that test.⁹ If immigration benefits are part of the motivation, see an immigration attorney first.

The federal adoption tax credit also generally will not help. The IRS defines a qualifying child for the credit as someone under 18 or physically or mentally incapable of self-care.¹⁰ A healthy adult adoptee does not qualify.

Social Security survivor benefits work the same way. An adult child can receive survivor benefits on a deceased parent’s record only if the child has a disability that began before age 22. A healthy adult adoptee cannot draw survivor benefits from the adoptive parent, regardless of the legal relationship.

After the Judgment: Updating Records

The signed judgment is the main legal document, but a few follow-up steps align official records with the new relationship.

Amended Birth Certificate

Oregon Vital Records can issue a new birth record listing the adoptive parents. You submit a certified copy of the adoption decree (or an Adoption Report form with the court’s original seal), a birth record order form showing the adoptee’s new name and the adoptive parents’ names, a copy of a current photo ID, and the fees. The amendment fee is $35, plus $25 for a computer-issued short-form certificate or $30 for a full-image long-form. Expedited processing adds $30 and takes three full business days once everything is in hand.¹¹

Social Security Card

If the adoptee’s name changed, update the Social Security Administration next. You can start online in some cases or call 1-800-772-1213 to set up an office appointment. Replacement cards arrive by mail within five to ten business days.¹²

Everything Else

Once the birth certificate and Social Security card reflect the new name, use them to update the driver’s license, passport, bank accounts, and other records. Most agencies will ask for the adoption decree or the amended birth certificate as proof. Doing the Social Security update early tends to prevent problems later, since many institutions verify names against that record.

1
Oregon State Legislature. Oregon Code 109.329 – Adoption of Person 18 Years of Age or Older or Legally Married
2
Oregon State Bar Professional Liability Fund. Adult Adoptions Checklist
3
Oregon Judicial Department. Oregon Judicial Department Forms Center
4
Oregon Judicial Department. Petition and ASSIS Requirements Adoption and Readoption
5
Oregon Judicial Department. 2026 Circuit Court Fee Schedule
6
Oregon State Legislature. Oregon Code 21.135 – Standard Filing Fee
7
Oregon State Legislature. Oregon Code 109.041 – Relationship Between Adopted Child and Natural Parents
8
Oregon State Legislature. Oregon Revised Statutes Chapter 112 – Intestate Succession and Wills
9
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 5 Part E Chapter 2 – Eligibility
10
Internal Revenue Service. Adoption Credit
11
Oregon Health Authority. Adoption Process in Oregon – Vital Records and Certificates
12
Social Security Administration. Change Name with Social Security