Candidates (O)

Bernard J. O’Connell

• 1952 – New York’s 25th congressional district (D) – lost

David Joseph O’Connell

• 1920 – New York’s 9th congressional district (D) – lost
• 1922 – New York’s 9th congressional district (D) – won
• 1924 – New York’s 9th congressional district (D) – won
• 1926 – New York’s 9th congressional district (D) – won
• 1928 – New York’s 9th congressional district (D) – won
• 1930 – New York’s 9th congressional district (D) – won

James E. O’Connell

• 1940 – Ohio’s 2nd congressional district (D) – lost

Jeremiah Edward O’Connell

• 1922 – Rhode Island’s 3rd congressional district (D) – won
• 1924 – Rhode Island’s 3rd congressional district (D) – won
• 1926 – Rhode Island’s 3rd congressional district (D) – lost
• 1928 – Rhode Island’s 3rd congressional district (D) – won

Jerry Joseph O’Connell

• 1936 – Montana’s 1st congressional district (D) – won
• 1938 – Montana’s 1st congressional district (D) – lost
• 1940 – Montana’s 1st congressional district (D) – lost

John A. O’Connell

• 1962 – California’s 6th congressional district (D) – lost

John J. O’Connell

• 1952 – Washington’s 6th congressional district (D) – lost

John Matthew O’Connell

• 1932 – Rhode Island’s 2nd congressional district (D) – won
• 1934 – Rhode Island’s 2nd congressional district (D) – won
• 1936 – Rhode Island’s 2nd congressional district (D) – won

John O’Connell

• 1964 – Texas’ 20th congressional district (R) – lost

John P. O’Connell

• 1920 – Massachusetts’ 6th congressional district (Liberal, Labor, D) – lost

M. Fred O’Connell

• 1922 – Massachusetts’ 3rd congressional district (D) – lost
• 1932 – Massachusetts’ 3rd congressional district (D) – lost

Mort L. O’Connell

• 1940 – New Jersey’s 7th congressional district (D) – lost

Walter J. O’Connell

• 1954 – New Jersey’s 9th congressional district (D) – lost

Bernard M. O’Connor

• 1980 – New York’s 35th congressional district – – lost

Charles O’Connor

• 1928 – Oklahoma’s 1st congressional district (R) – won
• 1930 – Oklahoma’s 1st congressional district (R) – lost

Colleen Marie O’Connor

• 1974 – California’s 41st congressional district (D) – lost

Danny O’Connor

• 2018 – Ohio’s 12th congressional district (Special) (D) – lost
• 2018 – Ohio’s 12th congressional district (D) – lost

Donald J. O’Connor

• 1948 – New York’s 39th congressional district (D, Liberal) – lost
• 1950 – New York’s 39th congressional district (D, Liberal) – lost
• 1952 – New York’s 36th congressional district (D, Liberal) – lost

Ed O’Connor

• 1966 – California’s 23rd congressional district (D) – lost

Eugene P. O’Connor

• 1968 – New York’s 40th congressional district (D) – lost

Henry J. O’Connor

• 1920 – New York’s 18th congressional district (R) – lost

J. L. O’Connor

• 1938 – Minnesota’s 7th congressional district (D) – lost
• 1940 – Minnesota’s 7th congressional district (D) – lost

James Francis O’Connor

• 1936 – Montana’s 2nd congressional district (D) – won
• 1938 – Montana’s 2nd congressional district (D) – won
• 1940 – Montana’s 2nd congressional district (D) – won
• 1942 – Montana’s 2nd congressional district (D) – won
• 1944 – Montana’s 2nd congressional district (D) – won

James Francis Thaddeus O’Connor

• 1922 – United States Senate (North Dakota) (D) – lost

James H. O’Connor

• 1954 – New York’s 35th congressional district (D, Liberal) – lost

James O’Connor

• 1920 – Louisiana’s 1st congressional district (D) – won
• 1922 – Louisiana’s 1st congressional district (D) – won
• 1924 – Louisiana’s 1st congressional district (D) – won
• 1926 – Louisiana’s 1st congressional district (D) – won
• 1928 – Louisiana’s 1st congressional district (D) – won

John C. O’Connor

• 1922 – New York’s 16th congressional district (R) – lost

John D. O’Connor

• 1928 – Massachusetts’ 2nd congressional district (D) – lost

John F. O’Connor

• 1970 – New York’s 35th congressional district (R, CON) – lost

John Joseph O’Connor

• 1924 – New York’s 16th congressional district (D) – won
• 1926 – New York’s 16th congressional district (D) – won
• 1928 – New York’s 16th congressional district (D) – won
• 1930 – New York’s 16th congressional district (D) – won
• 1932 – New York’s 16th congressional district (D) – won
• 1934 – New York’s 16th congressional district (D) – won
• 1936 – New York’s 16th congressional district (D) – won
• 1938 – New York’s 16th congressional district (R, Andrew Jackson) – lost

John O’Connor

• 1954 – Iowa’s 1st congressional district (D) – lost

John T. O’Connor

• 1936 – Tennessee’s 2nd congressional district (D) – lost
• 1942 – Tennessee’s 2nd congressional district (D) – lost

Kevin O’Connor

• 1998 – Connecticut’s 1st congressional district (R) – lost
• 2020 – United States Senate (Massachusetts) (R) – lost

Kevin O’Connor

• 2020 – United States Senate (Minnesota) (Legalize Marijuana Now) – lost

Kim O’Connor

• 2020 – Florida’s 2nd congressional district (I-W/I) – lost

R. E. O’Connor

• 1938 – West Virginia’s 6th congressional district (R) – lost
• 1940 – West Virginia’s 6th congressional district (R) – lost

Shawn P. O’Connor

• 2016 – New Hampshire’s 1st congressional district (I) – lost

Thomas A. O’Connor

• 1980 – New York’s 37th congressional district (RTL) – lost

Thomas J. O’Connor, Jr.

• 1960 – United States Senate (Massachusetts) (D) – lost

Thomas L. O’Connor, Jr.

• 1984 – California’s 27th congressional district (PF) – lost
• 1986 – California’s 27th congressional district (PF) – lost

Herbert Romulus O’Conor

• 1946 – United States Senate (Maryland) (D) – won

Wilbert Lee O’Daniel

• 1942 – United States Senate (Texas) (D) – won

Caroline Love Goodwin O’Day

• 1934 – New York’s at large congressional district (D) – won
• 1936 – New York’s at large congressional district (D) – won
• 1938 – New York’s at large congressional district (D, American Labor) – won
• 1940 – New York’s at large congressional district (D, American Labor) – won

Joe O’Dea

• 2022 – United States Senate (Colorado) (R) – lost

Craig O’Dear

• 2018 – United States Senate (Missouri) (I) – lost

Angelia O’Dell

• 2010 – Oklahoma’s 1st congressional district (I) – lost

Gloria O’Dell

• 1992 – United States Senate (Kansas) (D) – lost

Richard Wayne O’Dell

• 2004 – Nevada’s 3rd congressional district (IA) – lost

Kieran O’Doherty

• 1964 – New York’s 17th congressional district (CON) – lost

Christine Therese O’Donnell

• 2006 – United States Senate (Delaware) (W/I) – lost
• 2008 – United States Senate (Delaware) (R) – lost
• 2010 – United States Senate (Delaware) (Special) (R) – lost