2004 United States Senate election in North Dakota

The 2004 United States Senate election in North Dakota  was held on November 2, 2004, concurrent with other elections for president, the United States House of Representatives, and various state and local offices. Incumbent Democratic-NPL U.S. Senator Byron Dorgan won re-election to a third term by a landslide margin of 36.6 percentage points, sweeping every county in the state, even while Democratic presidential nominee John Kerry lost the state by 27.3 percentage points. Despite this landslide victory, as of 2024, this is the last time the Democratic-NPL won the Class 3 Senate seat from North Dakota.

Democratic-NPL

 * Byron Dorgan, incumbent U.S. Senator

Republican

 * Mike Liffrig, attorney

Counties that flipped from Republican to Democratic

 * Sheridan (largest city: McClusky) (previously tied)