2013 ORS § 34.120¹
Courts having jurisdiction

(1) Except as provided in subsection (2) of this section, the circuit court or judge thereof of the county wherein the defendant, if a public officer or body, exercises functions, or if a private person or corporation, wherein such person resides or may be found, or such private corporation might be sued in an action, shall have exclusive jurisdiction of mandamus proceedings, including proceedings under ORS 215.429 (Mandamus proceeding when county fails to take final action on land use application within specified time) and 227.179 (Petition for writ of mandamus authorized when city fails to take final action on land use application within 120 days).

(2) The regular division of the Oregon Tax Court or judge thereof shall have jurisdiction in mandamus proceedings in all cases involving tax laws as described in ORS 305.410 (Authority of court in tax cases within its jurisdiction), and the Supreme Court may take original jurisdiction in mandamus proceedings as provided in section 2 of amended Article VII of the Oregon Constitution. [Amended by 1965 c.6 §10; 1999 c.340 §6; 1999 c.533 §1]