Barbara Mikulski Democratic Barbara Mikulski Democratic The 2004 United States Senate election in Maryland was held on November 2, 2004.

Senator Barbara Mikulski won re-election to a fourth term.

This is the most recent time that a Democratic Senate candidate has won Allegeny County, Caroline County, St. Mary's County or Worcester County.

This is the last time that the winning candidate carried a majority of Maryland's county-level jurisdictions in a United States Senate election in Maryland.

Democratic Republican Green Votes Cast