Candidates (O)

Gustavo Ortega

• 2014 – Arizona’s 7th congressional district (D-W/I) – lost

Mike Rivera Ortega

• 2002 – Texas’ 24th congressional district (R) – lost

Gina Ortiz Jones

• 2018 – Texas’ 23rd congressional district (D) – lost
• 2020 – Texas’ 23rd congressional district (D) – lost

Adam Ortiz

• 2022 – Vermont’s at large congressional district (I) – lost

Albert Ortiz

• 1936 – New Mexico’s at large congressional district (FL) – lost

Bobby Ortiz

• 1994 – Texas’ 16th congressional district (R) – lost

Robert Ortiz

• 2008 – Florida’s 2nd congressional district (I-W/I) – lost

Solomon Porfirio Ortiz

• 1982 – Texas’ 27th congressional district (D) – won
• 1984 – Texas’ 27th congressional district (D) – won
• 1986 – Texas’ 27th congressional district (D) – won
• 1988 – Texas’ 27th congressional district (D) – won
• 1990 – Texas’ 27th congressional district (D) – won
• 1992 – Texas’ 27th congressional district (D) – won
• 1994 – Texas’ 27th congressional district (D) – won
• 1996 – Texas’ 27th congressional district (D) – won
• 1998 – Texas’ 27th congressional district (D) – won
• 2000 – Texas’ 27th congressional district (D) – won
• 2002 – Texas’ 27th congressional district (D) – won
• 2004 – Texas’ 27th congressional district (D) – won
• 2006 – Texas’ 27th congressional district (D) – won
• 2008 – Texas’ 27th congressional district (D) – won
• 2010 – Texas’ 27th congressional district (D) – lost

John H. Ortman

• 1974 – California’s 37th congressional district (AI) – lost

Bill Orton

• 1990 – Utah’s 3rd congressional district (D) – won
• 1992 – Utah’s 3rd congressional district (D) – won
• 1994 – Utah’s 3rd congressional district (D) – won
• 1996 – Utah’s 3rd congressional district (D) – lost

Duane Orton

• 1960 – Iowa’s 7th congressional district (D) – lost

Michael Osborn

• 1970 – Tennessee’s 9th congressional district (D) – lost

Robert A. Osborn

• 1922 – New York’s 25th congressional district (D) – lost

Steve Osborn

• 2006 – United States Senate (Indiana) (L) – lost

Bartley P. Osborne

• 1960 – Pennsylvania’s 26th congressional district (R) – lost

Brandon C. Osborne

• 2004 – California’s 50th congressional district (L) – lost

Charles Osborne

• 1942 – New York’s 36th congressional district (D, American Labor) – lost

Ethan Osborne

• 2022 – Kentucky’s 4th congressional district (I) – lost

Gardner C. Osborne

• 2006 – Texas’ 12th congressional district (L) – lost
• 2008 – Texas’ 17th congressional district (L) – lost

George Osborne

• 1924 – Kentucky’s 9th congressional district (R) – lost

Henry Zenas Osborne

• 1920 – California’s 10th congressional district (R) – won
• 1922 – California’s 10th congressional district (R) – won

John Osborne

• 1994 – Tennessee’s 5th congressional district (R) – lost

Lithgow Osborne

• 1932 – New York’s 36th congressional district (D) – lost

Michael D. ‘Oz’ Osborne

• 2000 – Virginia’s 9th congressional district (R) – lost

Morgan Osborne

• 2012 – California’s 37th congressional district (R) – lost

Thomas C. Osborne

• 1926 – Nebraska’s 6th congressional district (D) – lost

Thomas William Osborne

• 2000 – Nebraska’s 3rd congressional district (R) – won
• 2002 – Nebraska’s 3rd congressional district (R) – won
• 2004 – Nebraska’s 3rd congressional district (R) – won

W. Ted Osborne

• 1958 – Ohio’s 1st congressional district (D) – lost
• 1960 – Ohio’s 1st congressional district (D) – lost

Jim Osburn

• 1992 – Tennessee’s 7th congressional district (I) – lost

Laura Osby

• 1934 – Illinois’ 5th congressional district (Comm.) – lost

William J. Osby

• 1972 – New York’s 27th congressional district (Liberal) – lost

Douglas Arlo Ose

• 1998 – California’s 3rd congressional district (R) – won
• 2000 – California’s 3rd congressional district (R) – won
• 2002 – California’s 3rd congressional district (R) – won
• 2014 – California’s 7th congressional district (R) – lost

Jim Osgood

• 1974 – California’s 36th congressional district (R) – lost

Ted Osgood

• 2008 – West Virginia’s 1st congressional district (W/I) – lost

Val Oshel

• 1974 – Illinois’ 24th congressional district (I) – lost

Van Oshel

• 1968 – Illinois’ 21st congressional district (R) – lost

John Oshinskie

• 1948 – Pennsylvania’s 12th congressional district (D) – lost

Richard C. Oshlo

• 1968 – Iowa’s 7th congressional district (D) – lost

Samuel Oshry

• 1932 – Pennsylvania’s 33rd congressional district (S) – lost

William Osipoff

• 1986 – Michigan’s 14th congressional district (I) – lost

Cristina Osmeña

• 2018 – California’s 14th congressional district (R) – lost

Jonathan Ray Osment

• 2016 – Michigan’s 11th congressional district (L) – lost

Frank C. Osmers, Jr.

• 1938 – New Jersey’s 9th congressional district (R) – won
• 1940 – New Jersey’s 9th congressional district (R) – won
• 1952 – New Jersey’s 9th congressional district (R) – won
• 1954 – New Jersey’s 9th congressional district (R) – won
• 1956 – New Jersey’s 9th congressional district (R) – won
• 1958 – New Jersey’s 9th congressional district (R) – won
• 1960 – New Jersey’s 9th congressional district (R) – won
• 1962 – New Jersey’s 9th congressional district (R) – won
• 1964 – New Jersey’s 9th congressional district (R) – lost
• 1966 – New Jersey’s 9th congressional district (R) – lost

Rich Osness

• 2000 – Minnesota’s 1st congressional district (L) – lost

Maurice S. Osser

• 1948 – Pennsylvania’s 3rd congressional district (D) – lost
• 1950 – Pennsylvania’s 3rd congressional district (D) – lost

Thomas Jonathan Ossoff

• 2017 – Georgia’s 6th congressional district (Special) (D) – lost
• 2020 – United States Senate (Georgia) (D) – won

James Ostby

• 1930 – Montana’s 2nd congressional district (FL) – lost

William L. Osteen

• 1968 – North Carolina’s 6th congressional district (R) – lost

David Osterberg

• 1998 – United States Senate (Iowa) (D) – lost

David E. Osterfeld

• 1984 – Indiana’s 5th congressional district (L) – lost