Robert Y. Thornton
Judge on the Oregon Court of Appeals
In office 1971–1983
Preceded by	Edward H. Branchfield
Succeeded by	Jonathan Uhry Newman
Oregon Attorney General
In office January 5, 1953 – May 20, 1969
Governor	Paul L. Patterson Elmo Smith Robert D. Holmes Mark Hatfield Tom McCall
Preceded by	George Neuner (R)
Succeeded by	Lee Johnson (R)
Oregon State Representative 3rd District, Tillamook
In office 1951–1953
Preceded by	Edward A. Geary (R)
Succeeded by	Harry C. Elliott (R)
Personal details
Born	(1910-01-28)January 28, 1910 Portland, Oregon
Died	November 29, 2003(2003-11-29) (aged 93) Salem, Oregon[1]
Political party	Democratic
Spouse	Dorothy Marie Haberbach
Children	1 son
Occupation	Attorney, Jurist

Robert Y. Thornton (January 28, 1910 – November 29, 2003) was an American attorney, politician, and jurist in the U.S. state of Oregon.^[2] A Democrat, he was the second-longest serving Oregon Attorney General in the state's history, holding that office from 1953 to 1969. His 16-year tenure was second only to Republican Isaac Homer Van Winkle, who bested him by seven years, serving from 1920 to 1943.^[3] Thornton was the Democratic nominee for Oregon Governor in 1962, losing in the general election to incumbent Mark Hatfield.^[4]

His ultimate defeat by Republican Lee Johnson, who garnered some 80,000 more votes than Thornton in the 1968 general election, became a matter for the courts. Thornton challenged the outcome by bringing a suit charging that Johnson had violated campaign spending limits and falsified a report by signing the blank form. Johnson admitted he had done so in anticipation of being out of the country when the report was to be filed. A three-judge panel in Marion County ruled in favor of Thornton, invalidating the election results and awarding Thornton an additional term. The Oregon Supreme Court overturned that decision and awarded the office to Johnson, on the grounds that neither violation was deliberate and that both had occurred after the election.^[3]

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• AB, Stanford University, 1932
• Postgraduate study, University of Oregon, 1933–35
• JD, George Washington University, 1937^[2]

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• 1971-1983 - Judge, Oregon Court of Appeals
• 1953-1969 - Oregon Attorney General
• 1951-1953 - Oregon State Representative^[5]
• 1946-1953 - Private practice of law (Tillamook, Oregon)
• 1941-1946 - U.S. Army, World War II, Japan, attaining rank of Lieutenant Colonel
• 1939-1941 - Private practice of law (Tillamook)
• 1938-1939 - Assistant Solicitor, U.S. Department of the Interior
• 1937-1938 - Law Clerk, District of Columbia Court of Appeals^[2]

• Thornton, Robert Y. (March–April 1956). "Organized Crime in the Field of Prostitution". Journal of Criminal Law, Criminology, and Police Science. 46 (6): 775–779. doi:10.2307/1139977. JSTOR 1139977.