Wash. Rev. Code » Title 11 · Chapter 11.12
Revised Code of Washington

Wash. Rev. Code § 11.12.010 (2026)

Who may make a will

✓ current as of May 2026
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Any person of sound mind who has attained the age of eighteen years may, by last will, devise all his or her estate, both real and personal.
All wills executed subsequent to September 16, 1940, and which meet the requirements of this section are hereby validated and shall have all the force and effect of wills executed subsequent to the taking effect of this section.
[ 1970 ex.s. c 17 s 3; 1965 c 145 s 11.12.010. Prior: 1943 c 193 s 1; 1917 c 156 s 24; Rem. Supp. 1943 s 1394; prior: Code 1881 s 1318; 1863 p 207 s 51; 1860 p 169 s 18.]
Notes of Decisions
Cited in 12 cases, 1952–2014 · leading case: State v. Shawn P., 859 P.2d 1220 (Wash. 1993).
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State v. Shawn P., 859 P.2d 1220 (Wash. 1993). · cites it 2× “[47] RCW 11.12.010. [48] RCW 2.36.070. [49] See RCW 9A.”
In re the Guardianship of Lamb, 265 P.3d 876 (Wash. 2011). “RCW 11.12.010; see also Toler v. Murray, 886 So.”
In re the Est. of Alsup, 327 P.3d 1266 (Wash. Ct. App. 2014). · cites it 3× “RCW 11.12.010 provides that “[a]ny person of sound mind who has attained the age of eighteen years may, by last will, devise all of his or her estate, both real and personal.”
Lighter v. Marvin, 749 P.2d 691 (Wash. Ct. App. 1988). “RCW 11.12.010. A will contest focuses on the issues of testamentary capacity, undue influence, or fraudulent misrepresentation as to the will's execution.”
In Re Mitchell's Est., 249 P.2d 385 (Wash. 1952). “RCW 11.12.010), the applicable part of which reads: “The following persons of sound mind, may, by last will, devise all his or her estate, both real and personal: “1.”
Est. of Campbell v. Berge, 288 P.2d 852 (Wash. 1955). “See RCW 11.12.010 and 11.12.020 [cf. Rem. Supp.”
In Re Drown's Est., 372 P.2d 196 (Wash. 1962). “From the order admitting the will to probate and appointing James M. Sakshaug as executor, Oren L. Drown has appealed, contending on appeal that the court erred in its determination that the will was not revoked.”
Jacobs v. Brock, 406 P.2d 17 (Wash. 1965). · cites it 2× “The right of testamentary disposition of one's property is a valuable right granted by statute (RCW 11.12.010), and a testator may will his property to any person he wishes regardless of whether such person has done little or a great deal for him in his lifetime.”
Malloy v. Smith, 134 Wash. 2d 316 (Wash. 1998). “See RCW 11.12.010, RCW 11.02.005(9), RCW 11.12.”
Matter of Est. of Malloy, 949 P.2d 804 (Wash. 1998). “See RCW 11.12.010, RCW 11.02.005(9), RCW 11.12.”
Est. of Theodore Roosevelt Alsup (Wash. Ct. App. 2014). · cites it 3× “RCW 11.12.010 provides that "[a]ny person of sound mind who has attained the age of eighteen years may, by last will, devise all of his or her estate, both real and personal.”
Ross v. Comm'r, 71 T.C. 897 (1979). “010 Who may make a will. Any person of sound mind who has attained the age of eighteen years may, by last will, devise all his or her estate, both real and personal.”
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