Oregon Revised Statutes Remedies and Special Actions and Proceedings § 34.120

(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 and 227.179.

(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, and the Supreme Court may take original jurisdiction in mandamus proceedings as provided in section 2 of amended Article VII of the Oregon Constitution.