Wash. Rev. Code § 59.12.050 : — LANDLORD AND TENANTFORCIBLE ENTRY AND FORCIBLE AND UNLAWFUL DETAINER — Jurisdiction of proceedings TEXT PDF The superior court of the county in which the property or some part of it is situated shall have jurisdiction of proceedings under this chapter. RCW 59.12.050 1891 c 96 § 6; RRS § 815. Prior: 1890 p 75 § 5. Venue and jurisdiction, generally: RCW 2.08.010 and chapter 4.12 RCW.