How Eugene and Lane County fathers who aren’t married to the mother establish paternity and secure custody, parenting time, and fair child support. October 2026
Unmarried fathers in Oregon have exactly the same rights as married fathers, once paternity is legally established. ORS 109.060 says the legal relationship between a parent and child is the same whether or not the parents were married, and ORS 107.137 forbids courts from preferring one parent over the other based solely on gender.
The catch is the phrase “once paternity is established.” A married father is presumed to be the parent of a child born during the marriage under ORS 109.067. An unmarried father gets no presumption. Until parentage is established, you have no enforceable right to custody or parenting time, no matter how involved you are. (Oregon’s statutes now use the gender-neutral term “parentage,” but the rules apply to fathers in the same way.)
Oregon offers three main routes:
If there is any doubt about biology, address it before you sign. In a court case, a judge generally must order genetic testing when a party’s sworn statement alleges a reasonable possibility of parentage (ORS 109.184). An acknowledgment can be rescinded only within the earlier of 60 days after it takes effect or the first court hearing involving the child; after that, it can be challenged only for fraud, duress, or a material mistake of fact. If the mother is married to someone else, the spouse may be the presumed parent, and you should talk to a lawyer before taking any step.
This is the trap many fathers fall into. Signing the acknowledgment makes you a legal parent, but it does not give you a parenting schedule. Under ORS 109.161, the parent who had physical custody when paternity was established, usually the mother, has sole legal custody until a court orders otherwise. Without a court order, police generally cannot help you see your child, and the mother can make decisions about school, medical care, and even where the child lives.
"Your name on the birth certificate makes you Dad. A court order makes your parenting time enforceable."
Once paternity is established, either parent can file a case under ORS 109.103 to set custody, parenting time, and child support. That statute gives unmarried parents the same rights and responsibilities as married or divorced parents, and the same custody, support, and mediation rules apply. In Lane County, that usually means mediation and a parenting plan, just like a divorce.
The first time the court decides custody, neither parent has to prove a change of circumstances (ORS 109.161). The judge looks at the child’s best interests using the factors in ORS 107.137, including:
Joint custody is possible, but under ORS 107.169 it can be ordered only if both parents agree. Even if you don’t receive legal custody, you can receive substantial parenting time. Our posts on custody vs. parenting time and Oregon child custody laws explain the difference, and our child custody page covers the process.
It is frustrating, but showing up uninvited or keeping the child after a visit can backfire badly. The better move is to file. Because ORS 109.103 applies Oregon’s divorce-case custody rules to unmarried parents, you can ask the court for temporary custody or parenting time orders while your case is pending, as explained in our post on temporary and status quo orders. In the meantime, keep offering to help, keep a written record of every request and response, and keep your messages civil. Judges notice which parent stayed calm.
Legal parentage brings the duty to support your child. Support is calculated under the same Oregon guidelines that apply to married parents, based largely on both parents’ incomes and the amount of parenting time. While a paternity case is pending, the court can order temporary support under ORS 109.154. See our child support page and our guide to calculating child support in Oregon. Paying support doesn’t buy parenting time, but a consistent record of paying shows the court you take your responsibilities seriously.
We help Eugene and Lane County fathers establish paternity, file for custody and parenting time, and get support set fairly. Whether your child is a newborn or a teenager, schedule a consultation and we’ll map out the fastest path to an enforceable order.
This article provides general information about Oregon law and is not legal advice. Every family’s situation is different; consult a lawyer about your specific circumstances.
We’ll help you establish paternity, secure a parenting plan, and build a lasting relationship with your child.
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