Who appointed Diarmuid Fionntain O'Scannlain?

President Ronald Reagan appointed Diarmuid Fionntain O'Scannlain to the U.S. Court of Appeals for the Ninth Circuit in 1986.

Was Diarmuid Fionntain O'Scannlain appointed by a Democrat or a Republican?

Diarmuid Fionntain O'Scannlain was appointed by President Ronald Reagan, a Republican. JudicialFinder records the appointing president's party, not a judge's own politics.

What was Diarmuid Fionntain O'Scannlain's confirmation vote?

Diarmuid Fionntain O'Scannlain was confirmed by voice vote on September 25, 1986. No senator-by-senator tally was recorded.

Ninth Circuit / Appointed 1986 / Senior status since 2016

Diarmuid Fionntain O'Scannlain

Judge, U.S. Court of Appeals for the Ninth Circuit

Appointed by President Ronald Reagan in 1986 and confirmed by voice vote, Diarmuid Fionntain O'Scannlain is a Judge on the U.S. Court of Appeals for the Ninth Circuit. He earned a law degree from Harvard Law School in 1963. Sources ↓

Born: 1937 · age 89
Appointed by: Ronald Reagan, 1986
Confirmed: by voice vote
Education: St. John's 1957 · Harvard Law School 1963
Succeeded: Robert Boochever
Succeeded by: Danielle Jo Forrest

Federal judicial service

Year	Court	Appointed by	Vote
1986	Ninth Circuit succeeded Robert Boochever	Reagan (R)	Voice vote

Party letters show the appointing president’s party, not the judge’s own. A voice vote means the chamber approved aloud. No senator-by-senator tally is recorded.

Confirmation vote

Voice vote

The Senate approved this confirmation aloud, with no senator-by-senator tally recorded. Recorded roll-call votes begin in 1989.

Education

St. John's University	B.A.	1957
Harvard Law School	J.D.	1963
University of Virginia School of Law	LL.M.	1992

Questions & answers

Who appointed Diarmuid Fionntain O'Scannlain?: President Ronald Reagan appointed Diarmuid Fionntain O'Scannlain to the U.S. Court of Appeals for the Ninth Circuit in 1986.
Was Diarmuid Fionntain O'Scannlain appointed by a Democrat or a Republican?: Diarmuid Fionntain O'Scannlain was appointed by President Ronald Reagan, a Republican. JudicialFinder records the appointing president's party, not a judge's own politics.
What was Diarmuid Fionntain O'Scannlain's confirmation vote?: Diarmuid Fionntain O'Scannlain was confirmed by voice vote on September 25, 1986. No senator-by-senator tally was recorded.
Which court is Diarmuid Fionntain O'Scannlain on?: Diarmuid Fionntain O'Scannlain is a Judge on the U.S. Court of Appeals for the Ninth Circuit.

Sources

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39 years on the U.S. Court of Appeals for the Ninth Circuit. Data as of 2026-08-10. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).