Diane Linthicum

Diane Linthicum is an American politician, currently serving in the Oregon State Senate. A member of the Republican Party, she represents the 28th district, which encompasses all of Klamath County as well as outlying parts of Deschutes and Jackson Counties.

She is the wife of the previous senator to hold this seat, Dennis Linthicum, who was deemed ineligible to run for re-election due to his participation in the 2023 Oregon Senate walkout and the passage of Measure 113, which denied eligibility to run for re-election to any state legislator with 10 or more unexcused absences in a legislative session.

Education Linthicum studied business at Orange Coast College and Rio Hondo College, both community colleges located in California.

Career In her biography, Linthicum lists her occupational background as an office manager and CFO for Aslan Enterprises, and as the owner of Burning Daylight Foods. Linthicum and her husband, Dennis, also own a ranch.

Linthicum served as chief of staff, constituent program director, and policy analyst for her husband while he served in the Oregon State Senate.

In the 2025 session, Linthicum was appointed vice-chair of the Human Services Committee. She was also appointed to the Health Care Committee and the Committee on Early Childhood and Behavioral Health.

Personal life Linthicum and her husband, Dennis, have two children. They live in Beatty.

Electoral history