Wash. Rev. Code » Title 26 · Chapter 26.26A
Revised Code of Washington

Wash. Rev. Code § 26.26A.100 (2026)

Establishment of parent-child relationship

✓ current as of May 2026
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A parent-child relationship is established between an individual and a child if:
(1) The individual gives birth to the child, except as otherwise provided in RCW 26.26A.700 through 26.26A.785;
(2) There is a presumption under RCW 26.26A.115 of the individual's parentage of the child, unless the presumption is overcome in a judicial proceeding or a valid denial of parentage is made under RCW 26.26A.200 through 26.26A.265;
(3) The individual is adjudicated a parent of the child under RCW 26.26A.400 through 26.26A.515;
(4) The individual adopts the child;
(5) The individual acknowledges parentage of the child under RCW 26.26A.200 through 26.26A.265, unless the acknowledgment is rescinded under RCW 26.26A.235 or successfully challenged under RCW 26.26A.200 through 26.26A.265 or 26.26A.400 through 26.26A.515;
(6) The individual's parentage of the child is established under RCW 26.26A.600 through 26.26A.635; or
(7) The individual's parentage of the child is established under RCW 26.26A.705 through 26.26A.730.
[ 2018 c 6 s 201.]
Notes of Decisions
Cited in 3 cases (3 in the last 5 years), 2023–2026 · leading case: Welfare Of B.H.-W. (Wash. Ct. App. 2025).
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Welfare Of B.H.-W. (Wash. Ct. App. 2025). · cites it 6× “34 RCW, “‘[p]arent’ means the biological or adoptive parents of a child, or an individual who has established a parent-child relationship under RCW 26.26A.100.” RCW 26.26A.100 provides an exhaustive list of avenues for establishing a parent-child relationship.”
In Re the Interest of: B.R. (Wash. Ct. App. 2026). · cites it 2× “Genetic testing can also establish parentage and, under certain circumstances, courts can order a person to complete genetic testing for this purpose.”
M.M. v. Tacoma Sch. Dist. No 10 (W.D. Wash. 2023). “This statute is the only one to 21 define “legal guardian,” and it expressly excludes parents from that term: “‘Legal guardian’ means 22 the department, an agency, or a person, other than a parent or stepparent, appointed by the court 23 to promote the child’s general welfare,…”
Wash. Rev. Code § 26.26A.100(5): 1 case
Welfare Of B.H.-W. (Wash. Ct. App. 2025). “34 RCW, “‘[p]arent’ means the biological or adoptive parents of a child, or an individual who has established a parent-child relationship under RCW 26.26A.100.” RCW 26.26A.100 provides an exhaustive list of avenues for establishing a parent-child relationship.”
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