Oregon Revised Statutes Elections § 247.035

(a) The person's residence shall be the place in which habitation is fixed and to which, when the person is absent, the person intends to return.

(b) If a person's property is split by a jurisdictional line, the person shall be registered where the residence is located. If the residence is split by a jurisdictional line, the person shall register where the greatest value of the residence is located according to county assessment and taxation records.

(c) A person shall not be considered to have gained a residence in any location in this state into which the person comes for temporary purposes only, without the intention of making it the person's home.

(d) If a person moves to another state with the intention of making a permanent home, the person shall be considered to have lost residence in this state.

(e) If a person goes from this state into any other state or territory and votes there, the person shall be considered to have lost residence in this state.

(f) A person who has left the place of the person's residence for a temporary purpose only shall not be considered to have lost residence.

(a) Where the person receives personal mail;

(b) Where the person is licensed to drive;

(c) Where the person registers motor vehicles for personal use;

(d) Where any immediate family members of the person reside;

(e) The address from which the person pays for utility services; and

(f) The address from which the person files any federal or state income tax returns.