RCW 7.105.075: Venue.

An action for a protection order should be filed in the county where the petitioner resides. The petitioner may also file in:

(1) The county where an act giving rise to the petition for a protection order occurred;

(2) The county where a child to be protected by the order primarily resides;

(3) The county where the petitioner resided prior to relocating if relocation was due to the respondent's conduct; or

(4) The court nearest to the petitioner's residence or former residence under subsection (3) of this section.